Oil Catch Cans Crankcase Pressure, Provent 200 vs Mishimoto vs Universal oil catch can

Рет қаралды 72,352

4 жыл бұрын

Are you afraid that an oil catch can will increase the crankcase pressure, spilling oil everywhere? Here is the answer! Check the description as well. If you also wondered what is normal crankcase/engine pressure, here it is.
I was really worried that my oil catch can in my turbo diesel 1.6HDi Peugeot Partner (2007; M59; ~102,000 miles or ~164.000 km) will lead to stress in the engine, i.e. increased crankcase pressure, blown seals, oil will be coming out, etc. This video is a relatively conclusive test that this particular oil catch can (copy of the Mann-Hummel Provent 200) does not increase the crankcase pressure, but others do. For example an universal oil catch can , even with steel scourers does not increase the crankcase pressure, but a mishimoto oil catch can substantially increase the crankcase pressure. The car is similar to a Citroen Berlingo and the engine is the same as in 1.6TDCi (Ford), Volvo, Suzuki, Mini, Mazda3, etc.
If you find this video useful, buy me a coffee: www.paypal.com/paypalme/morem...
All my car-related purchases: www.amazon.co.uk/shop/moremol...
The cheap Mann-Hummel Provent 200 oil catch can is MASO (amazon UK): amzn.to/2YIuJ97 or ebay: ebay.us/lpKALx
The kkmoon baffled oil catch can with the bronze filter (amazon UK): amzn.to/3B0HqQt or ebay: ebay.us/3eD5Eg and is the same as the Mishimoto oil catch can (amazon UK): amzn.to/3hK0uYn or ebay: ebay.us/rDu7rX
The universal oil catch can (amazon UK): amzn.to/3IBdA6y or ebay: ebay.us/bKkoB5
The sensor for crankcase pressure measurement is Bosch DPF exhaust pressure sensor (0-1bar) and the part number is: 0281002772 (amazon UK): amzn.to/3H1H8dp or ebay: ebay.us/6tVVqL
The videos explaining how I did the crankcase pressure measurements are here: • Reading absolute press... and here • Reading absolute press...
The arduino code is included in the two previous videos.
The new Mishimoto oil catch can that is classified as MMBCC-HF and the HF stands for high flow (amazon UK): amzn.to/2NiiY3P or ebay: ebay.us/XfrHY1, but it is quite expensive. Here is the Mishimoto website for this oil catch can: www.mishimoto.co.uk/universal... and a bit more on how they designed it: www.mishimoto.com/engineering...
The actual results are here:
Baseline (original intake, no oil catch cans) 1.55mbar
Mann-Hummel Provent 200, cheap steel filter 1.58mbar
Mann-Hummel Provent 200, original filter 1.54mbar
kkmoon (Mishimoto) with bronze filter 6.20mbar
kkmoon (Mishimoto) no bronze filter 2.85mbar
universal oil catch can no steel scourers 2.10mbar
universal oil catch can with steel scourers 2.40mbar
#HDi #CarMods #OilCatchCan
Disclaimer:
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Пікірлер: 362

@kevinm6283 Жыл бұрын

The best video and explanation I’ve ever seen. Very well done. And I’ve seen a lot of catch can videos. I run the brass micron filter and ordering the other can in the video right now. Thank you so much.

@moremolecules Жыл бұрын

Yeah, I was always concerned about crankcase pressure and if something will happen using them, hence the video. Basically for my own peace of mind.

@stugillis 10 ай бұрын

You think the pressure wouldn’t increase so much in a petrol engine? Thanks

@jplunkett3647 4 жыл бұрын

nice testing and explanation ..... due diligence / research is critical in ANY subject matter ,,, thank you ,,, i am now a subscriber based on this video

@Thinkforyourselvz 4 ай бұрын

Thanks mate, as this is something I have been thinking about when I installed a catch can on my 6L LS. This clears it all up for me now.

@adrpals2324 2 ай бұрын

I've heard bad and good thing about catch cans, especially about the pressure in the engine. Your videos is great and a wealth of information.

@robh8131 8 ай бұрын

Really useful comparisons. I'm erring on a system for my UK 2 litre diesel that incorporates relief valves to allow 'through flow / bypass' if a filter becomes clogged. But put off by the silly prices of Genuine Mann 200 Pro Vent CC and the Flash Lube CC replacement filters. Many thanks for your informative test.

@proobuio 3 жыл бұрын

This is nicely done sir. I was wondering why mishimoto added those fancy bronze filters knowing that it would be add more restriction to the air flow. And im glad this answers it

@johnmcmullen456 Жыл бұрын

Thank you for all your efforts, found it very helpful.

@fahdismalek7729 3 жыл бұрын

thank you so much for exceptional information. i've remove the bronze filter.now car feel better

@seanbrennan4447 4 жыл бұрын

Great to find a channel that has the same car and age as mine :) thanks

@moremolecules 4 жыл бұрын

Hahaha, I know what you mean. Hope the videos are useful.

@RockAndRollFirebird Жыл бұрын

perfect work my friend! thank you for this valuable measurement... 👍

@gianlucajukic7933 9 ай бұрын

Fantastic video. Seriusly congratulation for make this test.

@kevinoneill41 2 ай бұрын

Back in 1990 I saw a diesel engine generator with a 2qt paint can as a catch can filled a course fiber. The crankcase was vented straight to the center top of the can. The lid was perferated with what appeared to be knife stabing holes all over the top of the lid. The can was placed in a larger pan with an oil spill pad on the bottom. 😂😂 my guess is that this was better than venting straight to atmosphere. I had to open the can. What I found was amazing. It appeared to be working quite well. 😮

@acaborneo5335 3 жыл бұрын

I was used oct mishimito on my captiva diesel, its make engine seal cover leaks.thanks for make this video very very good

@802Garage 2 жыл бұрын

That's definitely why! Especially under boost, you crankcase pressures are going to be much too high. Lucky it was only your valve cover seal.

@littlefishinggoat5409 3 жыл бұрын

I just purchased a MH provent 200 for my vehicle. I'm glad to see I made the right choice.

@enriquep4857 3 жыл бұрын

Very nice video. Waiting for your "How to replace the trasmission of your Peugeot". I really need this video haha, my car is asking me urgently.

@moremolecules 3 жыл бұрын

Hahaha, luckily for me it is good for the moment.

@ahmedalhakimi7251 10 ай бұрын

Best video of catch can comparison

@BettaharMostafa 9 ай бұрын

Best Chanel for 1.6 hdi

@steiljeds 18 минут бұрын

thank you. benchmark data is always best for breaking theories and myths

@offroaddst9747 4 ай бұрын

This is gold. Thank you very much sir

@armandomolina8758 2 жыл бұрын

Great information i run that universal can with steel wool. It catches 1oz in 1000miles

@marioroque3768 4 ай бұрын

Thanks very much for sharing this! Very useful

@diylife1688 5 ай бұрын

very good test important to note that when the provent paper filter is dirty, it blocks considerably, i had this happen on my diesel. My oil was being forced out of my oil filler cap on rocker cover. So much!!!.the metal one not so mucj so if you've got all of these still i would recommend a second vid3o of them all dirty.

@moremolecules 5 ай бұрын

Yes, I bet them all dirty will be quite a substantial increase in pressure.

@802Garage 2 жыл бұрын

Great test. Wow! That eBay catch can could create a lot of problems. That can cause the turbo oil return to be pressurized and back up. That will make the turbo smoke like crazy and can obviously make people think there are all kinds of issues. Not to mention other potential harm from high crankcase pressure. The ProVent 200 setup is impressive as demonstrated many times now. This was all done at idle? Under boost I imagine all of these numbers could change, but the eBay catch can would clearly become the most problematic. Good info to have!

@moremolecules 2 жыл бұрын

Yes, all was done under idle. I also tried to match the temperature of the engine, i.e. had a quick go around the block to bring the engine to operating temperature if I was fiddling for too long. Yes, the numbers would change under boost, but because there is more suction (turbo spool) the crankcase pressure is the highest at idle.

@802Garage 2 жыл бұрын

@@moremolecules I guess that would depend on how much blow by there is and perhaps it's different with diesel vs gas, but a lot of gas vehicles see the highest amount of PCV flow under high boost, but not necessarily pressure so I see what you mean. Yeah the turbo will be sucking the most as well, but if you were using a restrictive catch can like that, the flow could be far too much and the pressure would back up causing a massive PCV pressure spike. That's my concern. With a good flowing system yes pressure should be lower. :) Again awesome vid.

@moremolecules 2 жыл бұрын

@@802Garage Thank you very much indeed, much appreciated. Diesels are a bit different as compared to gas/petrol, they need their turbo, although naturally aspirated exist. Their max crankcase pressure is always at idle. I tested under boost and with any blip of the throttle, you get lowe crankcase pressure.

@KingZoneOne 7 ай бұрын

I have the Provent 200 on my petrol Audi A4, and I LOVE it! It's actually an oil/air separator (not a "catch can"), and it has both a pressure release valve, AND an active pressure regulating valve along with two different types of filter materials (nylon screen and sponge), a plastic coalescence screen, and room for an added wad of steel wool to increase coalescence. The type of filter element is really what matters. I'd never use a "catch can". They are overpriced, are nowhere near as efficient as an actual oil/air separator, and having TWO pressure regulators makes the comparison moot. .

@stefanogallotta316 4 ай бұрын

Hi mate. Where did you buy the Provent 200? It is original ? I agree with you catch cans are useless. Thank you

@Refertech101 Жыл бұрын

Yes you can have some thing that filters good with small delta P, but like any thing, you pay for it, and size is larger, the Parker CCV systems are very efficient

@scoupemaster 5 ай бұрын

thanks for the info veru good explanation and test!!!!!

@thegreatfixer 4 жыл бұрын

thank you excellent demo

@moremolecules 4 жыл бұрын

Thank you for the comment and encouragement

@deanword6500 2 жыл бұрын

Very well instrumented testing and thanks for the suggestion on electronics. However, only looking at idle conditions is not a good analysis. The engine spends most of its time at engine speeds far above idle and under varying crankcase pressure/vacuum levels.

@moremolecules 2 жыл бұрын

I completely agree. The test I wanted to do is: "is there an increase in crankcase pressure with different oil catch cans". The highest crankcase pressure will be under idle, so that is why I did it under idle. Of course, there will be different vacuum/pressure levels under load, but very difficult to test under normal road conditions. I would not be able to replicate the same journey. If there is a dyno or rolling road, then it can be done, but I have not got access to these. It can be done with driving on normal roads, but then again one needs to repeat it several times, then averages, distributions, standard errors, etc., and it will become a statistical test. Most people will switch off and not follow in order for the test to be accurate and representative.

@glenncivale6824 8 ай бұрын

Excellent Information, TY.

@north4961 2 жыл бұрын

Congrats on a job well done! Excellent video explanation! Exactly the info I was looking for my 2014 3.0 liter Ecodiesel. Im going with Provent with stainless like yours, but before I put on I am going to run HoTShot Stiction oil treatment. If I do before, Hot Shot Stication will not reach the turbo through the vapours , which it relies on. LOL - I might end up putting 2 Y's so when I want to run oil treatments I just turn the 2 valves? your thoughts?

@moremolecules 2 жыл бұрын

Thank you for the good words. Not familiar with the HoTShot oil tratment, but in any respect any oil catch can is not 100% efficient. Various percentages thrown around on the web, so in any case something will pass through. I have to pass annual inspection every year and my oil catch can is deemed an emissions modification, despite that it helps rather than produce more emissions. I simply remove my oil catch can system and put in the stock. You could use similar way to run your treatment. I know it is a faff.

@13adrian Жыл бұрын

I have been looking at the mishimoto mmbcc-hf that has been mentioned as it hasn't got the brass filter it also has larger inlet and outlet I think 27mm

@ozstriker4075 8 ай бұрын

Excellent video with great testing methods. So I've got the numbers right, the actual pressure with the mishomoto + bronze filter was 4.62mbar? (6.20 - 1.58 as it was connected with the man Hummel)

@moremolecules 8 ай бұрын

Almost correct. The Mann Hummel 1.58 was 0.01 or so different from the natural crankcase pressure of the engine. So, leaving it there does not add more crankcase pressure, thus no need to do 6.20-1.58, it is 6.20. Hope that makes sense.

@craigdoherty2974 3 жыл бұрын

Have used a few of the cheap ones and have been worried about the flow/ pressure. I extend the baffle or air / oil seperator with tube of alum, you can also use Plastic pipe. Keep it off the bottom about 3/4 of an inch and that is where I put the steel scubbing pad small amount . Wanted more time for the air/oil to drop separate by giving it a path and for it not for to just go in and out since they are beside each other. Will know next oil change if it sucks more oil than last time. Also like these for smaller motors as they produce less volumes of pressure. Bigger cubes more air. Got this on my Honda element and put the larger K1 on my Chevy G10 van . Seemed to smooth idle out somewhat to and I guess acts as a vac can storing it up for braking etc. You mention neg vac with turbo under load

@moremolecules 3 жыл бұрын

Hi craig, absolutely agree with the alum tube down. I should do that, it's been on my list, it would certainly help. I think there was also a modification, where this tube is with holes, so it does not restrict too much. Yeah, the air will find the shortest path, i.e. from one hole to the other.

@craigdoherty2974 3 жыл бұрын

@@moremolecules wondered about the holes but spoke with my flow bench guy and meh. Can cause turbulence i use a tube the size of the screen so no flow loss. Also as air hits the side drilled tube holes the oil which will be dripping down them to be sprayed doing just the opposite of what you want. Rather it go down tube then through the media/scrubber and find it's way out. Idea is oil drops in droplets/like fuel . Let the oil drop and air up . Not sure how to post a pic of mine on here maybe i will do a video. You can email me. If your still worried about bubbles try farting in the bath tub and tell me what happens ?

@moremolecules 3 жыл бұрын

@@craigdoherty2974 Yes, I'm worried about the pressure that needs to push the air through the oil/water that will have collected down there. If one blows through a straw in water, there is resistance. The holes in the sides are only for that purpose, the general flow will still go down. Yes, if oil/water accumulates down, the flow will go through the holes.

@kevinoneill41 2 ай бұрын

I did something similar. A DIY "can" made out of 4" PVC a cleanout access with a end cap makes a 7"X4" can with a top screw on access lid, a 1" ID heater hose to the Can. Is fitted with a 90 % elbow or coupler at the upper end of the can facing down on the inside of the can with 1/4" holes perforating 1/2" tube or baffle 1" from the bottom of the can. The glued-on end cap is fitted with a 3/8" ball valve for drainage. The inside bottom of the can is raised 1.5" with an X pattern of 3/8" holes perforating PVC and then topped with a sink drain screen. From there to the top of the can and the 1" exit port is filled with copper pot scrub pads the last pad next to the 1" exit port is an SS pot scrubby pad. This is vented to the atmosphere with a one-way check valve and a valve cover CCV filter. As this can is mounted on the frame of my F350 4X4 6.4 diesel. The possibility of going through some water is low but still quite possible. I tested the exhaust out of the can with a little tissue paper. It appeared to be working great. We will see. I will check it at 500km then 1000km and last at 5000km for regular Oil and filters servicing and of course, undercarriage inspection.👍😊❤️🇨🇦

@Hoster987 Жыл бұрын

very informative...as for In / Out, I also installed mine opposite of what's on the can and wasn't catching much. When I installed per instruction, it caught more oil / water - also just put fine mesh screens (2) in the baffle. I think either way is fine as you either catch the oil / water from PCV or catch before the air re-enters the intake. I also put a steel wool in there..not sure changing to copper scrubber makes any difference (Mishimoto's have "bronze" filter so.. :- )

@cumshot247 6 ай бұрын

Why would you think think either way is fine, when you just said you installed the opposite of what's on the can and wasn't catching much.🤦‍♂

@kumara5492 2 жыл бұрын

Well detailed video. I followed your video and installed OCC successfully. I ran my Toyota Prius hybrid on maintenance mode for almost an hour ( to check if it's still overheating intermittently due to weak water pump that I replaced with new water pump and that's been fixed ) but I noticed the hose that I connected from outlet of Oil catch can ( universal OCC) that goes into the intake manifold was completely flat due to high pressure. Do you think OCC might not be functioning as it supposed to or should I replace the hose with the heavy duty hose ( thicker one) , like the one I got that connects from PCV valve to inlet of OCC. Do you think I need to get a fuel line hose which is thicker than the one I installed ( maybe I got radiator hose ) .I subscribed. Thank you for you reply

@moremolecules 2 жыл бұрын

Yes, replace the hoses with heavy duty ones that would not collapse under pressure/vacuum. I would get something that is fuel safe hose, but such that it would not collapse under pressure.

@ptownhoopsquad 3 жыл бұрын

Hey, great channel, loads of very good info. Just wondering if you have replaced the plastic inlet manifold? I just got a 1.6 hdi 145k miles. The inlet is really blocket up with carbon and goop. I dont think i will be able to clean it out of the plastic inlet. So i want to buy a new one. I am looking on ebay and all are aftermarket, just wondering if they are any good quality

@moremolecules 3 жыл бұрын

Thanks for the encouragement. Which plastic inlet manifold is that? Is it the PCV valve one?

@araboharabedian Жыл бұрын

Interesting video and it got me thinking about my car and how I have the catch can Installed. In a gasoline naturally aspirated inline six cylinder engine would there be much concern for increased crankcase pressure if I decided to use the mishimoto type bronze filter cans? I’m only asking the question since I can really benefit from the decrease of blow by into my intake manifold but not at the cost of raising crank case pressure and blowing out all my seals and causing leaks I do not wish to have 🤷🏼‍♂️

@moremolecules Жыл бұрын

Good question. I would always thread on the cautious side of things and get a bigger (if there is space to fit) oil catch can, for example the Provent200 or bigger.

@FixItWithJon 5 ай бұрын

Love your videos. Did you buy a hose & mounting kit for your Provent 200 or did you have to buy separately / make up a kit?

@moremolecules 5 ай бұрын

I made my own kit with the hoses and the mounting stuff. Unfortunately, for my car there were not any mounting kits and space was quite tight.

@barniboy9336 3 жыл бұрын

Thank you, thank you for a very nice, well documented and scientific approach ! I have also done my part of experiments and come to the same conclusion wrt. the sintered bronze filter. The pressure drop across those is rather high. In your example the filter looked kind of dry. But when this type of filter is wetted by oil droplets over (a short) time, the pressure drop will increase even more. These filters are simply too small in terms of filter area for an application like this, where just a few millibars matter. It is interesting to note, that only the Mann & Hummel filter takes advantage of the cyclone effect, by having a TANGENTIAL inlet. By this, the incoming fumes, with oil-droplets, will be whirling along the insides of the canister, splashing off most of the droplets (being heavier than fumes) at practically no pressure drop. An old trick from the process industry. There is another issue that I have not seen mentioned in the many Oil-Catch-Can videos: The intercooler ! Let me explain: A turbo-charged engine will have an intercooler. This is due to the fact that air is heated when compressed. When air is heated it expands and thus, less air/fuel will go into the engine and nothing is gained from the turbo. Unless you cool the air after the turbo. The intercooler is normally fitted under the radiator and is thus the lowest point in the air-intake system. Where do you think the oil-droplets and oil residues inside the air intake system is gonna end up ? Right ! Over time, must oil films deposited on the insides of tubes and hoses in the intake system is slowly, but steadily seeping down to the intercooler, filling it up. In fact, the intercooler is a perfect oil-catch can, being nice and cool, condensing oil-droplets in passing. Of course, the turbo outlet itself will provide a substantial pressure (thats what they do :-) and so some air is still gobbeling thru, but with limited, or no cooling action. My guess is that most intercoolers dont work. But then again: Its a good thing we never need those 250+ HP just by gurgling around town, so we havent noticed :-/

@moremolecules 3 жыл бұрын

Thank you very much indeed for the really detailed comment, more than appreciated. I would say it is somewhat scientific, as there are still a few variables unaccounted for, but still better than nothing I guess. Yes, the bronze filter has way too limited surface area. I think Mishimoto realised this as the huge Ford Cummins engine (6.5L) was throwing some errors and they produced a new oil catch can for this engine, much larger surface area and not 50 microns, but rather coarse mesh. Yes, the cyclone effect is pretty good actually. There was a scientific paper on that and it was the most efficient way without increasing/hampering the restriction/flow. I have thought about the intercooler, it is basically an oil catch can in its own right. I have already bought a second hand one to have some tests with it and will post a video someday. I am thinking of a semi-scientific way to test oil catch can efficiency and have some ideas, it is just time that is not enough. All the best.

@802Garage 2 жыл бұрын

Great insights, but one thing. Intercoolers absolutely work. The difference is massive. I highly recommend looking up the article "How intercooler design can changer the performance, efficiency and power of your engine" on Engine Basics as well as "Drop Intake Temperatures. Drop Track Times. Drop Jaws. The Ultimate Guide for Intercooler Selection!" by Mishimoto. The latter is much less data dense, but still demonstrates what a difference intercoolers make. Intercoolers are also a trade off between restriction, cooling, and efficiency.

@jacovandenheever4318 2 жыл бұрын

To test seperate will be more true test as all that beding and hose lenth will cause extra restrictions. Hope we can se can tests performing appart.

@moremolecules 2 жыл бұрын

It is a relative test at the end of the day. In addition, the bronze one is compared to another one with the same length hoses, so you get relative restriction compared to each other. The "fake" Mann-hummel does not add anything to the crankcase pressure, so leaving it there does not change the pressure.

@kayakwesty Жыл бұрын

Thank you for this video. I will be buying a knock off Provent 200

@mo80ris Жыл бұрын

Ths you for sharing bro ✌️

@michaelvanna8982 3 жыл бұрын

Wow..very good info

@bobreese4807 3 күн бұрын

Very helpful video!!!!!

@MatkoJun Жыл бұрын

@moremolecules I'm wondering - could increased pressure for mishimoto/universal catch cans be due to much smaller in/out ports? ProVent has 24mm internal diameter input/output ports whereas mishimoto and other cheap copies are usually around 10-12mm and the biggest I saw were 19mm outer (16mm inner diameter). It would be interesting to see what would be the pressure if one would make ports for mishimoto/universal bigger - say 22mm (which is original hdi hose connector inner diameter)

@moremolecules Жыл бұрын

Most of the increase in pressure does not come from the hoses or the smaller in/ou. I did try the Mishimoto/KKmoon without the bronze filter to see how much this adds. It was relatively substantual increase in pressure, so not just the hoses. But they all add to the increase in pressure. Basically, the bronze filter is the biggest contributer to the pressure increase. At the end of the day it is a balance between complete efficiency and permissive. If you have complete efficiency or close to that, it is to create resistance as the gasses need to pass through something where they have to coalesce, hence the increase in pressure as too big holes and you have little efficiency. Gas molecules, even laden with oil/water are still pretty small molecules.

@ericsson980 8 ай бұрын

Very informative. Great video sir. This is exactly what I'm looking for. I'm planning to install Oil Catch Can myself soon but wasn't sure if it's good because some video said not to install it because it will increase the crankcase pressure. Now I know it's the internal design of the Oil Catch Can that effect the crankcase pressure. Got the 'cheap' Oil Catch Can exactly like in your video in our local store. Will get those soon. Thanks again for this video.

@ericsson980 8 ай бұрын

Also my car is Mitsubishi triton 2.4 mivec. Has over 100k km on it. Do you think it's too late for installing Oil Catch Can? Thanks.

@moremolecules 8 ай бұрын

@@ericsson980 Never too late really. 100k is not that much anyway, so perfect time to put one.

@ericsson980 8 ай бұрын

@@moremoleculesthank you sir

@francescocarulli2401 Жыл бұрын

Ciao complimenti per il video. Hai mai provato il decanter con l'altro filtro sopra?

@moremolecules Жыл бұрын

I tried translating the comment, but was not too sure what it exactly meant about the decanter with filter on top. Sorry.

@xabizar 3 жыл бұрын

Great work! Is it possible that the actual mishimoto catch can's bronze filter is less restrictive than the cheap copy's filter?

@moremolecules 3 жыл бұрын

It is possible, but unlikely. I linked a video (in the description of the video)) of a comparison of the original mishimoto and the "fake" one and they are identical. I suspect it might be just the same factory producing them, but does not label them mishimoto

@GCS88 2 жыл бұрын

I've read in a forum before that its pretty restrictive, Mishimoto has then redesigned and replaced the bronze filter with some kind of big pore sponge type filter that covers the whole ceiling area of the can.

@kkmingming 3 жыл бұрын

Thank you!

@armandomolina8758 2 жыл бұрын

I was also worried about the pressure on that bronze screen choosing im ordering the plastic can im sold

@rachidsinno2487 3 жыл бұрын

So this test is for dieael engines. Any test on petrol engines, will the bronze filter increase the crankcase pressure as well...

@moremolecules 3 жыл бұрын

Yes, this is for a diesel engine, but it will be the same with a petrol engine wih respect to the increase in crankcase pressure

@francisvalerio9303 2 жыл бұрын

thanks. subbed to you channel

@Neema1135514 3 жыл бұрын

Hi nice video, Do you think that leaving the return pipe to the turbo disconnected will change anything apart from emissions ? or there is another reason for the return pipe to go back to the turbo !

@moremolecules 3 жыл бұрын

Hi Jaber, it has dual purpose. One is the emissions and the other is that the air pull from the turbo brings the crankcase pressure in the engine down, up to a degree of course (the PCV closes to stop the oil being sucked from the engine). I have it on a graph in this video: kzfaq.info/get/bejne/npqEhJCJu725Y2Q.html. When you press hard the acceleration, the turbo kicks in and the pressure in the engine is negative, with respect to atmospheric of course. This really helps the gasses being drawn out. If it is left out, not connected, then the pressure in the engine is always high, long-term is probably not a good thing.

@Neema1135514 3 жыл бұрын

@@moremolecules Thanks for the reply. It would be fun to run the car as you did in the linked video, but with the return pipe disconnected and see what the graph looks like, if it will be constant all the time like in idle or if we see some difference.

@moremolecules 3 жыл бұрын

@@Neema1135514 Yes, I have not done that, but it will be interesting to see what the pressure is.

@russ4972 3 жыл бұрын

On the universal catch can where do you put the mesh? In the main body or screw off the little baffle and stuff it in there?

@moremolecules 3 жыл бұрын

Hi Russell, I would put it in both. I would certainly put some in the little baffle, but in the main body will increase the crankcase pressure, although only slightly. In the main body will give a chance for the oil vapour to hit something and potentially coalesce into larger droplets and eventually into a liquid.

@ragheedhamdan 3 ай бұрын

Great video. i have been looking to install an Oil catch can on my gasoline engine for a while now. After watching your video, i got concerned about the positive crankcase pressure problem. Do you think installing an OCC with brass filter a bad idea?.

@bobreese4807 3 күн бұрын

Yep, one of the reasons I am leaning to ADD w1 or UPR.. ADD w1 is on sale for $109 for its V3. There is a YT video where a guy uses a cheap $20 OCC and removes the brass filter. I would always advise that.

@don.timeless4993 9 ай бұрын

thank you so much

@Abz84 9 ай бұрын

I have used that exact generic catch can following the in/out guide for my petrol NA honda. I used the 9.5mm fuel hose (OEM internal diameter hose size) from PCV to inlet of catch can with baffle only. Then I joined OEM 9.5mm OEM hose that was originally joined to PCV before to the outlet of the catch can. Do you think it will increase the pressure in the crankcase? The only doubt for me is the catch can itself as the hose I used is same as the OEM one.

@moremolecules 9 ай бұрын

It will add a little bit of pressure, but really depends on how worn your engine is. If it is not worn too much then it should be alright. It is a combination of the small hoses and the filter, but mostly it comes from the filter rather than the hoses.

@ViruZHUN 7 ай бұрын

Recently built a new 2.0hdi engine with the mishimoto knockoff with bronze filter. The oil was coming out of the rtv sealed places, getting rid of that shit.

@franabad 6 күн бұрын

Awesome video, wished I found it a couple of weeks earliers! Just installed a Mishimoto on a diesel Mercedes ML270, definitely not comfortable with those values. Nevertheless, the main problem I've been having is that I'm getting oil from the "out" port. Tried it the other way around, the "in" port throught the bronze mesh, and was getting better results, any ideas why? Anyway after watching your video, i think i will remove it completely

@moremolecules 5 күн бұрын

Well, not too sure why it is gathering oil on the out port. THe oil catch cans are not 100% efficient for separating the oil, so you will always get some on th eout port.

@bengleckl1877 2 жыл бұрын

So what is the safest way to hook up a catch can system?? Mine is a gasoline non turbo. Do I need two catch cans or is one good enough??? Just one catch can with no bronze filter would be best??? I assume id want it to be the same pressure it was before I installed anything?

@moremolecules 2 жыл бұрын

Hi Ben, apologies, I probably made it to look more complicated than it is. Only one catch can is enough, preferably the non-bronze one. If you engine is not too worn (not much blow-by) then even the bronze one will be quite good. If you have an older engine, then I would not recommend the bronze one. Yes, you want the pressure to stay as low as possible. I only used the two, as it was easier and I had them hooked up already.

@mohmadJO 2 жыл бұрын

Hello my friend I installed a cheap type oil catch can and it comes with a small filter on top Note that I bought the car three months ago Diesel engine 2500 A month after installation I found a little oil around the manfold casket and inside the intercooler The engine is good, there is no black or white smoke, and there is no oil loss after traveling 3000 km I really don't know if the reason is old or the cause is the oil catch can do it Another question Should the installation be done away from the engine, away from heat? Does it need to be installed a little higher than the engine level? Finally, sorry for my many questions and sorry for my English

@moremolecules 2 жыл бұрын

Not too sure what the problem is, but ideally you need to place the oil catch can as far away as possible from the heat. At the end of the day the oil catch can is a condensing thing and the bigger temperature differential really helps with condensing oil/water, etc. So, if you can cool the oil catch can really well, say with ice or cold water then the efficacy will be really good. Unfortunately, this is not practical in engines. I would not install an oil catch can higher from the crankcase breather, as the condensing fluid will come back and plug the hole. Ideally you need to put it lower than the crankcase breather so any fuild/oil to go into the oil catch can.

@dieseltips 4 жыл бұрын

Excellent work my friend. When you take out the oil filler cap do you see smoke and pressure coming out?

@moremolecules 4 жыл бұрын

Hi DieselTips, there is not much smoke and pressure coming out, of course there is some.

@hungnguyen-fl7wm 2 жыл бұрын

Hi brother! This video use Can Catch oil is copy of Provent 200 is right?

@moremolecules 2 жыл бұрын

That video uses the copy of the Provent 200

@jegramirez3308 Жыл бұрын

Thank you

@kevinoneill41 2 ай бұрын

I like the double catch can system. But that is just a play on emotions. After say 5000km how much oil. I will call it engine sewage that I do not want in my combustion chamber not ever. How much was collected in the cans. Did adding the second can help?

@moremolecules 2 ай бұрын

Yeah, it was only an experiment, I did not run it with two oil catch cans for long. Nevertheless, how much oil is rather difficult to answer. I had quite a few videos about how much it collects. In all honesty it depends on how worn the engine is of course. Most surprising was that the oil catch can pretty much most of the time collects water. Mixed with oil it becomes a bit milky substance. Depends on the weather of course, here in the UK it is more often than not humid or raining, so I collected a lot of water, but say California or here in the summer it collects mainly oil. Not too much to be honest, but that depends on the engine.

@bogdanelgiu7822 2 жыл бұрын

Hi man , thanks a lot for making and sharing the video, it has really good information and data comparison , has helped me understand how such a system works. I have installed a no name catch can with brass baffle ,drove about 6000 km and concluded that the engine has burned/leaked about 2-2.5 litres of oil . Now , I took the system out to see if the engine itself is defective or if my catch can system was somehow fault. I have the car only 5 months so I don't know yet if the engine burns oil or not, no blue smoke whatsoever and no puddel under the car.I must mention that out of the 6000 km , I drove about 4000 only on the motorway and up to almost 3000 rpm. Now the questions taking in consideration all the above, if it was the catch can's fault and was too much of a pressure in the engine, have I done damage to all the seals and o-rings inside ? Do you think it will still "burn" the same amount of oil without the catch can system? I would be glad to hear your opinion on this, thank you and keep up the good work !

@moremolecules 2 жыл бұрын

Hi bogdan, I completely understand your concern/question, but really difficult to answer conclusively. The bronze oil catch can does add to the crankcase pressure, but it should not be enough to cause oil leakage from the seals. It could be, but difficult to say with certainty. Depends what your engine is and what the current crankcase pressure is. If the oil catch can was enough to cause seals leaking, it would have happened anyway. The other thing is that depends on the hoses and your CCV/PCV valve. If the hoses collapse under pressure/vacuum, then that could have contributed rather than the oil catch can. It could be that the CCV or PCV (depends on what is in your engine) could be blocked or not working, that would certainly lead to oil seals leaking. You may need to investigate where oil is leaking from, as it may well be say be the sump plug.

@hemakalpoo5686 2 жыл бұрын

@@moremolecules Good day sir, I don’t know much on these things and oil catch cans. I have a Holden Colorado with a 2.8 Diesel engine and recently bought a mishimoto oil catch can with the Bronze filter and baffle. Would it be ok for that engine or should I remove the bronze filter?

@moremolecules 2 жыл бұрын

@@hemakalpoo5686 It really depends on the condition of the car. If it is in a good condition, it should be alright. I mean how much of a breather is the car, if it is not too heavy breather then the increase in the crankcase pressure will probably be OK with the bronze filter inside.

@mikescudder4621 Жыл бұрын

Cool.... nice one.

@keepitathousand420 Жыл бұрын

Great test! i was wondering if you can do the reading tests again but after 10-15 minute to be more accurate. Again thanks for the helpful video

@moremolecules Жыл бұрын

I wanted the same condition for all catch cans, so the engine was always in operating temperature. I can wait for the engine to be cold on all catch cans, but I cannot control how cold the engine will be, but I can always keep the engine in operating temperature, so more consistent test across the catch cans. Is that what you meant for the 10-15min wait?

@keepitathousand420 Жыл бұрын

@@moremolecules yeah of course it does give more accuracy doing the tests while engine is in operating temperature although you could try test while its cold it won’t hurt to see those numbers before warm up, but what i meant is could you repeat the test after idiling or driving for 10-15 min?

@moremolecules Жыл бұрын

@@keepitathousand420 Yes, the cold ones will be quite big, depends on how cold of course it is outside. Before doing the video I did quite a few runs on this to see what works and is the most representative. Generally, once the engine is relatively hot, the crankcase pressure does not change too much. Say if I drive for a bit and measure then will be almost exactly the same as if I had stopped for 10min to change the catch cans. I can probably do it anyway and see what comes out.

@moremolecules Жыл бұрын

@@keepitathousand420 I probably could, it would not hurt, but the difference is very little between these.

@deanharris7149 4 ай бұрын

Good to know!

@olafbrescia8389 Жыл бұрын

Do you still use the extra steel wool in the ProVent 200 with excellent 1.58 and 1.54 mbar readings? My current setup leaves no residue in the intake pipe or throttle body (great!), but my suspicion is it's causing too much back pressure over time. My valve cover has begun leaking. Does the ProVent w/mesh screen filter - clean the air well ???? I'm not going to return oil to the sump, but I would like the outlet air on the ProVent to be very clean, however. Suggestions?

@moremolecules Жыл бұрын

I still use it yes, but it might create back pressure or crankcase pressure. If that is the case, I would remove them altogether. I would not return to the sump, it is just that the filtered oil is not that clean, although onece the engine is in operating temperature all the stuff gets evaporated anyway. With the original paper filter it should clean well. Only way to see it is to have a go and see if your intake gets a bit oily. If it does, then have the mesh not too dense at all and add a bit more with time and monitor. All of these depend on how much crankcase pressure there is in your engine already, so difficult to tell and only experimentation will help you.

@olafbrescia8389 Жыл бұрын

@@moremolecules My rather sudden valve cover oil leakage is suspicious. I've been using a Moroso Oil Breather Tank with a positive breather attached w/return vacuum - but started driving the car a lot. I just ordered a copycat ProVent 200. I removed my wiper-wash tank on the other side of the engine bay and have long hoses to the Moroso - so this is cold and works very well. In your application, I would put straight copper pipe where possible to assist in condensation collection or move the tank far away - so it is cold. The Moroso inlet is simply too small - to ProVent is better. My application is modified VR6 12v 6-cyl. Great videos man!!!

@Wilhuff_T 2 жыл бұрын

How about making more tiny holes on the disk baffle for more air flow and removing the bronze filter and adding the scrub pad?

@moremolecules 2 жыл бұрын

Yes, that would work, but then again it will not be too different than the cheap one with the larger holes and the scrub pads. I guess that the bronze filter with a few larger holes will reduce the increase in the crankcase pressure.

@Wilhuff_T 2 жыл бұрын

That sounds like a good idea. Weekend project. Thanks Molecule.

@Mark_182 Жыл бұрын

Hi!! excellent video! cool!!! So would the kkmoon's copper filter be a good system for gasoline engines? Or would you recommend the Provent for a gasoline engine?

@moremolecules Жыл бұрын

If you can afford it I would still use the Provent, although the kkmoon is also alright. The only negative of the provent is that you need to replace the filter every so often, probably something like 20k miles.

@Mark_182 Жыл бұрын

@@moremolecules ok!! Actually, the issue of changing the filter doesn't bother me, if it helps the engine, it's fine for me, thanks for the help!!! 🤘

@moremolecules Жыл бұрын

@@Mark_182 I am always penny watching, so that is why I mentioned it. If you have not probelm with cnahging every so often it is a good system.

@Mark_182 Жыл бұрын

@@moremolecules excellent thank you very much!!! 😃

@s0007 3 жыл бұрын

Will this also increase pressure for a petrol engine? I see a lot of ppl running catch cans for a boosted (SC or turbo) petrol engine and maybe its doing more harm then good by increasing Crankcase pressure

@moremolecules 3 жыл бұрын

Yes, there is no principal difference in the crankcase pressure increase in the petrol engines. It is just that diesel engine have much higher combustion pressure of the gasses as there is no spark. What I am trying to say is that as far as I am aware, with some oil catch cans, e.g. the bronze filter ones, there will be some increase in crankcase pressure. The problem is to estimate how much is too much.

@YouTube--Video Жыл бұрын

Danke super erklärt habe 👍 vielleicht habt ihr auch auf meine Frage eine Antwort??? es geht um den zwei Liter TDI..Macht es da Sinn eine Öl catch can zu montieren? Bitte um eine detaillierte Antwort. Danke schön

@moremolecules Жыл бұрын

It is worth it. At the end of the day, these direct injection diesel engines are designed the same way. You get some oily vapour coming from the breather/PCV/CCV valves to the turbo and air intake, which combines into pretty hard stuff with the carbon from the EGR valve. You also get some carbon deposits on the back on the intake valves. An oil catch catch should minimise the oil, so you only get carbon from the EGR. All in all is worth it. WHat is the efficiency is difficult to tell, do you get 15% of the oil in the oil catch can or say 80%? I do not know, difficult to tell. Probably somewhere ~20-30%, maybe less. So, does it make a difference, also difficult to tell, but probably it does. I saw that some people have fitted the 1.9TDI with oil catch cans, so I suspect the 2.0TDI is probably not too difficult to put an oil catch can to it. If you want to keep you car for longer, probably worth it, if not, then probably not worth it.

@joshuagracias6354 3 жыл бұрын

Thank you for an informative video, I have one question: I have a catch can with the bronze filter. The catch can is routed from my PCV to an intake vacuum line. The catch can also has a drain valve at the bottom. When the engine is running I have opened the drain valve and i can feel the strong suction. As long as there is suction is it safe to assume that there is no build up in the crank case pressure?

@moremolecules 3 жыл бұрын

Hi Joshua, no necessarily though. It only restricts slightly. In other words, if you did not have the oil catch can, the one with the bronze filter, the vacuum/suction will have been stronger. I assume your engine is petrol as diesels under idle will not have strong suction, but pressure. It is tough to say if the restriction is enough to cause problems, e.g. oil leaking past seals.

@joshuagracias6354 3 жыл бұрын

@@moremolecules I do have a petrol engine and yes agree, suction could be stronger without the bronze filter, but as long as there is suction the crank case is being vented, which shouldnt cause any pressure build up, do you agree?

@moremolecules 3 жыл бұрын

@@joshuagracias6354 Yes, the crankcase gasses get sucked out and pressure relieved.

@MrAcc45 3 жыл бұрын

I suspected the bronze filter would increase pressure. imagine when it gets clogged up, the pressure would be even more I reckon.

@moremolecules 3 жыл бұрын

Hi Nizar, yes I was also suprised how much the pressure is with the bronze filter. It really depends on what pressure can the engine reasonable sustain. Overall there will be an increased pressure, but how much this will impact the engine is another question.

@MrAcc45 3 жыл бұрын

@@moremolecules Thx for the reply. I was worried abt this pressure. My engine has a lot of blowby and the pcv valve would get pretty oily and restrict flow. I keep hvg to clean it with brake clean very often. I have a replica mishimoto with the bronze filter, but this problem u highlighted was a big worry for me. thx for this video, it confirmed my fears. good thing the bronze filter is removable. I plan on removing the bronze filter and just keeping on the round baffle plate. currently im awaiting for some fittings via mail before install. in place of the removed bronze filter, i plan to screw in a barbed connector so that the blowby would have to travel down the can and up through the baffle and finally travel through the barb connector and out the can. hopefully it can capture the oils at the bottom without creating too much pressure. once i have setup I'll do a video and put a link. maybe provide updates occasionally.

@moremolecules 3 жыл бұрын

@@MrAcc45 That would be really good. Let me know if you do any videos, I'll post it on my community page.

@phiksit 2 жыл бұрын

Then throw in some cold winter weather and frozen water vapor will clog it up even more.

@boxpimp 3 жыл бұрын

I’d be interested in seeing what vent to atmosphere pressures look like. I can’t find any info online. It might not apply to your vehicle but plenty of people run breather cans

@moremolecules 3 жыл бұрын

Hi Jason, I do not quite remember if I did this test, but might do a quick test and compare the crankcase pressure with venting to the atmosphere.

@mrmotorvator5151 3 жыл бұрын

I run mine to atmosphere using 19mm id hose..seems to work well and can only benefit engine internals..no brainer

@AndoniFV 6 ай бұрын

@@moremoleculesllegaste a probar que presión tenías a la atmósfera? Un saludo?

@moremolecules 6 ай бұрын

@@AndoniFV Unfortunately I never did venting to the atmosphere test. I did not have at the time a filter that vented to the atmosphere, otherwise I would have tested it.

@gregnixon1296 3 жыл бұрын

What kind of hose is necessary for catch can back to intake? The 3/4" heater hose that I used collapses. Heat from the engine makes the hose pliable, and the intake's vacuum pressure causes it to collapse.

@moremolecules 3 жыл бұрын

Hi Greg, yes the usual hoses that are supplied with catch cans are too weak. I use fuel hose 25mm. It is a bit on the thick side, but it will not collapse, it is too rigid. The other option is to get reinforced silicone hose, but it has to be fuel safe, otherwise it will disintegrate eventually.

@CarminesRCTipsandTricks 3 жыл бұрын

Teflon lined Fuel Hose is actually the best. More expensive, a little harder to work with - but VERY stable and durable. It's impervious to Chemicals, which is why it's popular to use with E-85 Ethanol Fuel Systems.

@moremolecules 3 жыл бұрын

@@CarminesRCTipsandTricks Great advice and many thanks indeed. I will have to investigate this to see if I can purchase and replace my own hoses.

@user-qo2un9yp6j 4 ай бұрын

On the cheap catch can the intake and outtake inner diameter of threads how is it?? At man hummel is about 25-26mm and at i believe is around 10mm so that's probably why is a little more pressure.

@moremolecules 4 ай бұрын

Yes, could well be. As far as I remember the diameter of these were ~8-10mm, so twice smaller and the size of the can is smaller.

@francisleonetti1120 Жыл бұрын

Diesels have higher pressures so does the Mishimoto standard can cause issues with non diesel engines?

@moremolecules Жыл бұрын

Well, not too sure, I suspect with the lower pressure petrol engines it woul be fine. It really depends on the blow-by of the engine. The higher the bow-by relative to a new engine, the more problems it will cause.

@BrainDeadEngineering Жыл бұрын

HUGE!

@2525miche 2 ай бұрын

If the Universal Aluminium Engine Oil Catch Can ahave a breather on top, is it still good?

@moremolecules 2 ай бұрын

Yeah, it is still good. You can either block the breather or put a filter on it.

@cagdasagrgol-tg6rh Ай бұрын

Hi hope u r ok. İ broke bronze filter, took it off. Now will there any harmful crankcase pressure for engine? My car is 2012 year 2.0 turbo diesel chevrolete cruze.

@moremolecules Ай бұрын

Not too sure if I understood the question. You took it off completely, well I suspect that how the car was designed to begin with, so probably it is going to be alright.

@allahasan6631 3 жыл бұрын

I just bought a mashimotto repleca oil cath can same as yours with the bronze mesh . I have a civic with r18 na engine 1.8 lit and i want to put this oil cath can in but after what i saw maybe i wont i thinking about take off this bronze filter and put the stanless steal mesh that yo put bittwen the top cap and the steel plate (that with hules in it ) it will be alot of filtering mass and a better air flow can you check that out 😉

@moremolecules 3 жыл бұрын

Hi Far, yes, I was really surprised as well that it increased crankcase pressure quite a bit, I would say significantly more. Nevertheless, it's only 6mbars, so not that much. Then again, depends on what the engine can sustain. I suspect that this bronze filter will really filter oil rather well, apart from the crankcase pressure.

@allahasan6631 3 жыл бұрын

@@moremolecules i think its a good design to but if that pressure can blow gasget like between the engine and gear one its gone be lot of mess work and money its not like leaking from valve cover gasket

@moremolecules 3 жыл бұрын

@@allahasan6631 Yes, but that is the problem with oil catch cans, it is somewhat a trade-off between efficiency (fine filters) and blowing gaskets. So far I have not seen anyone investigating how much pressure is needed for a gasket to be blown and start leaking. If an engine is a heavy breather, then an oil catch can will add to that, so making matters slightly worse. The leak most likely will be between the block and the rocker cover, rather than anywhere else, but that is only a guess.

@davidwarren4569 9 ай бұрын

I don’t think those metal catch cans are meant for diesel engines, just petrol engines. But a nice analysis. Well done

@moremolecules 9 ай бұрын

Yes, could well be, although in the description of these they always put diesels as well. Overall there is a bit more crankcase pressure in the diesels as compared to petrols.

@jacovandenheever4318 2 жыл бұрын

Think a better test to test fist can, is to let it run first for a while to get soaked with oil. As it soaks up all the oil first than drain to bottom. Than restriction will be more. Want to agree with Joshua Gracias with turbo engines its sucking air through more, that the cans a better option

@moremolecules 2 жыл бұрын

I agree that getting an oil catch can soaked with oil will increase the crankcase pressure, as they become more restrictive. It does not matter if there is suction from the catch can or not, there will always be suction there, at the end of the day it is connected to the turbo. It just matters how much restrictive are the passages.

@marchiegalorio5751 23 күн бұрын

Hi, do you have tutorial on how you set up all that pipes? i want that idea to avoild damage of turbo charger. Because in normal pipes even there is no leak i saw black oil in the turbo.

@moremolecules 22 күн бұрын

Not too sure what tutorial, but I have a tutorial how I installed the oil catch can in my 1.6HDi, a whole plalist here with 2 videos how to do it: kzfaq.info/sun/PLx5YM-qLHn7wtOnyXn0MohIjAVivvG_nw And how to replace the turbo in the 1.6HDi: kzfaq.info/sun/PLx5YM-qLHn7ycuP79oti5D19COwGLmIhe

@marchiegalorio5751 20 күн бұрын

@@moremolecules thank you

@nikmohdyazid 7 ай бұрын

I wonder what's the crankcase pressure if you only use the mishimoto oil catch can

@moremolecules 7 ай бұрын

It is the same as running them both. It is just that it was more difficult to do it separately. The Mann-Hummel does not add anything, so what was measured was the actual crankcase pressure.

@jasonyoung5960 4 ай бұрын

I have one of thoes ones with the brass filter. I drilled 4 small holes in the filter and then filled the can with steel wool. I thought it looked restricted. Cheers

@bobreese4807 3 күн бұрын

Good idea

@zijie-he 3 жыл бұрын

Thank you for the video, really informational. I have just installed the "universal" oil catch can on my 4b11t and would like to know the impact. If you are running a turbo, would increasing the crankcase pressure be a plus? LOL

@moremolecules 3 жыл бұрын

Well, no, the increased crankcase pressure is the engine pressure, not much to do with the turbo. Generally, any excessive crankcase pressure is not wanted in the engine, as if it is excessive seals can leak oil. Most oil catch cans do not increase the crankcase pressure that much, but some do. It really depends on how heavy a breather your car is. Say, you car is a heavy breather, i.e. it is a bit worn and gasses pass the piston rings and result in higher than normal crankcase pressure, this will be compounded by the catch can and increase the crankcase pressure more, but it should not in general be that much of a problem.

@zijie-he 3 жыл бұрын

@@moremolecules thank you for your reply. My oil catch goes between pcv valve to intake. So if it has some level of air flow resistance, it will increase the pressure of valve cover. Though I know several millibars won't have any noticable impact. Just a joke.😂

@moremolecules 3 жыл бұрын

@@zijie-he Haha :-)

@andreabordo1675 Жыл бұрын

Hi, so i guess the best catch can is the unbranded one, the one you tried at the end. I bought one equal to the one that produces 2.1 mbar but, I don't know whether to insert the steel sponge? What do you suggest me? my car is turbo powered by petrol.

@moremolecules Жыл бұрын

Good questions! Best is difficult to define very well. In my eyes best oil catch can is one that filters oil the best, but there will always be a trade off between increased crankcase pressure, i.e. narrow passages or restrictions, and filtering of oil. You could have a catch can that filters nothing, for example just empty inside, and this will not increase crankcase pressure. Difficult to say which one is the best. I for one would not want too much crankcase pressure and the associated quite a few problems, gaskets, etc. If I were you I would not put steel sponge inside, it is already at ~2.1mbars, but that is relative to my engine, your engine pressure might be lower overall. Difficult to say, but I would not put the steel sponges/scourers inside.

@andreabordo1675 Жыл бұрын

@@moremolecules thanks for your advice

@Hoster987 Жыл бұрын

@@andreabordo1675 I have the same one and I put the steel wool in to catch more oil and/or prevent oil vapor going back in. Also inserted two layers of (circular) fine mesh screen in the baffle. My crankcase presssure probably increased by 0.1 🙂

@yikesomg3423 2 ай бұрын

To be honest, these pressures are so small does it even make a difference? except the kkmono/mishimoto one, they all just add like .50 mbar or 0.007 PSI. Is that so bad or negligable?

@moremolecules 2 ай бұрын

Depending on the engine, the normal pressure in these 1.6HDi is ~30mbars, so not really that much. Imagine from 1.5 to 6mbars out of the 30mbars is quite a bit. A little bit is not that roblematic, but then it depends on how much the engine is worn already. Say it is not 1.5mbars normal, but already a bit worn and somewhere already at 5mbars, adding another 5mbars is quite a bit.

@jimsgaragetoys4963 2 жыл бұрын

So from what I gather you are saying that the Mishimoto design is bad for diesels but for a gasoline engine it's not a problem? I have the Mishimoto on 3 of my cars and haven't seen any issues. My 2009 Corolla S is turbocharged and the crankcase is also vented with a filter so I would guess there is no problem at all with that set up. Did you also test a vented oil catch can? I also heard you say that this is an issue at idle and not at speed. Is that also true for a gasoline engine?

@moremolecules 2 жыл бұрын

Yes, the petrol/gasoline comment was a slip of the tongue. It would be similar to both. I did not quite say it is bad for diesels, only that compared to the others it increases crankcase pressure more substantially. Now it depends on the condition of the engine, if the engine is not a heavy breather then the slight increase in pressure is not that much of a problem. For some engines this increase in crankcase pressure could tip it to leaking from the seals. Unfortunately I did not test the venting to the atmosphere, it is illegal around here and I did not bother, maybe I should have. I have not tested the gasoline engines to check when is the highest crankcase pressure, but for diesels and I suspect petrol engines both would have the highest crankcase pressure at idle. It is just that under load the air flow (turbo or not) helps evacuate the gasses from the crankcase. I have not tested it but if venting to the atmosphere, you do not get this evacuation of gasses and it is kind of like constantly under idle or consistently under higher pressure, but might be wrong about that.

@jimsgaragetoys4963 2 жыл бұрын

@@moremolecules It would be interesting to see for sure in very controlled testing. I've seen a lot of people use the Mishimoto design and Ive not seen any people mention any problems. If there was a huge issue it would seem that this would be a known and highly talked about issue. I've seen information about using a vented system on pre-PVC car and a closed system on cars with a PVC valve. Your video make me have more questions than answers since I've never heard of this being a problem.

@moremolecules 2 жыл бұрын

@@jimsgaragetoys4963 Many thanks indeed for the interesting discussion, much appreciate it. I only made that video because I did not know the difference between the different oil catch cans in terms of crankcase pressure. I really searched a lot for what is normal or usual crankcase pressure for my engine or any engine, because that is important in terms of how much more can you increase it with say the mishimoto oil catch can. I only found one single website for a mini cooper petrol engine and the reference value was ~30mbar. So, if this is anything to go by, the Mishimoto oil catch should not lead to any problems, as the overall increase in crankcase pressure if not that much as compared to the max 30mbar. The only problem can arise if the overall crankcase pressure of the engine is really high, say worn engine and it is close to the maximum. Then adding the Mishimoto could tip it over and lead to leaking seals. Now if an engine is that worn, I suspect that people will either recondition it or throw it away anyway. So, I suspect that most people just have relatively good engines and the Mishimoto would not cause leaking seals. Now an interesting question is, will the higher crankcase pressure cause any problems down the line. Maybe, but it is only a guess and it might not lead to anything overall.

@jimsgaragetoys4963 2 жыл бұрын

@@moremolecules Thanks, for your reply. I'm guessing that I haven't found issues with the OCC because the pressures were higher at idle and not while driving. I think of how little time my cars spend at idle so I'm not too worried. Thanks for your time and information.

@moremolecules 2 жыл бұрын

@@jimsgaragetoys4963 No worries and thank you for the interesting conversation. I guess it will also depend on how worn the engine is. All the best

@ZanSunstrider Жыл бұрын

Nice video but im surprised you didnt test catch can with a breather on top if it :)

@moremolecules Жыл бұрын

Yes, good question. Simple reason I do not have one to test unfortunately.

@gheorghinacov6008 Жыл бұрын

There is also difference in diameter of hose and connector. Mann-Hummel and your OEM setup got very large hose. Mishimoto and the unknown catch cans had very small diameters compared to the other setups. You can make the test again with the Mishimoto and unknown cans on cars with smaller vent hose diameter. That’s my guess

@moremolecules Жыл бұрын

Yes, I completely agree. It is rather difficult to detemine is the increased crankcase pressure comes from the catch can itself or the smaller hoses. I suspect it is from the hoses. Very good suggestion to testing the same with the smaller hoses for the Mishimoto and the other one. This should show if these increases come purely from the hoses. The problem is that the maximum hose intake is pretty small on the mishimoto. I think I have a smaller-sized port for the mishimoto so I can try it. Thank you!

@gheorghinacov6008 Жыл бұрын

@@moremolecules And thank you for your videos! I wait for your next one

@jasonhumphry5836 Жыл бұрын

@@moremolecules I'd like to see a hose size comparison as well as I have a dorman oil catch can on a 2012 chevy malibu running small hoses I've thought about changing to large hoses but I also don't want vacuum leaks and it's working perfectly awesome peace and much respect to you 👍 JASON awesome video 😀 👍 👏

@moremolecules Жыл бұрын

@@jasonhumphry5836 Smaller diameter hoses will add a little bit of pressure, but not that much. If you look at the video with the comparison of the cheap universal oil catch can had only little pressure above the mann hummel, despite the hoses being much smaller diameter. So, it will add a little bit of pressure, but not very substantial.

@jasonhumphry5836 Жыл бұрын

@@moremolecules thanks for the added information

@derverdachtige1406 3 жыл бұрын

do you guys think, i can use the KKmoon for my mazda 2.2 turbo diesel?

@moremolecules 3 жыл бұрын

It really depends on how heavy breather is youe mazda 2.2. If it is not a very heavy breather, i.e. not very worn engine, then it should be OK. If it is then I would use some of the more permissive ones, e.g. mann hummel or the universal one.

@eduardodaquiljr9637 8 ай бұрын

Do we have pressure in crankcase?so oildeep stick tube is sealed?

@PrincipalityofZeon Ай бұрын

I've used a small o ring for it. Used soapy water to check all fittings to be sure

@dinnicusor5312 7 ай бұрын

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@moremolecules 7 ай бұрын

Yes, 6mbar seems like low and that is on idle bear in mind. The maximum on a brand new engine is ~30-35mbar, so 6mbar is quite substantial if one thinks about it. Unfortunately, I do not have the specs, I took the 30-35mbar from a different similar engine, but it is in that ballpark figure.