What question would you like answered on the next Ask A Tech?

Saves spakplugs from oil fouling, definitely worth using one!!!

As a former GM tech your answer to the last question was right on the money!!! I started out rotating tires and oil changes, once I proved to my Service Manager I would show up everyday he sent me to St Clair college in Dayton OH for my GM training, when I left the Dealership to be a Trucker 15 years ago I was GM and ASE certified in Electrical, AC, Steering and Suspension, Brakes Manual Transmissions and was working on getting certified for Automatic Transmissions!!!! I got paid to go to School so yes it was worth it!!!!!

When I swapped the stock 5.7 HEMI intake manifold for the 392 active intake manifold that's when I added a catch can. The 392 intake was brand new...well off of a wrecked 392 car with less then 1000 miles that is. With the active runners I didn't want any oil messing with the intake. That's why I installed a catch can. And yes the 392 intake runners do work, they're controlled with an MSD timer to open at 4800 rpm. If you are familiar with RT Life you can watch his instalation of the 392 intake and during the video he calls me for help with the wiring. 😁

5th Gen (2019+) Ram 1500 with the Hemi got rid of the mechanical fan from the factory. I for one don't miss it.

Great video Sky! Really enjoyed your answer to the last question 👍

This was a great Q&A! A lot of good information shared. Thanks for taking the time to help people understand and learn. Keep it coming! (By the way great back ground😉)

To add about a catch can here, I took my intake manifold off at about 30k miles to port it. The ports on the manifold and heads were all gunked up. Cleaned them thoroughly. I had to pull them again recently for doing some work, only 3,000 miles later, and there's a fair amount of oil already coating and gunking up on the intake ports on the heads - with the catch can installed. Yeah, it's catching oil, but it definitely won't prevent oil build up.

I think that on anything that is direct injected an oil catch can is a must. These engines are well known to build carbon up on the valves the more oil you can keep out of the induction side of the engine the longer you can go between manually cleaning the intake valves. The induction flush kits only clean things up enough to clear up the valve seats and valve stem coking it can get to the point that volumetric efficiency is effected.

That is exactly why I installed a catch can on my 21 Redeye Charger. Before I drove it anywhere, I installed it.

I like these videos always learning something!👍

Thanks, for the youtube video on the 5.7 engine. I have installed a Flex-a-Lite fan kit on my 5.7 engine runs at 199 temps most of the time.

Every car needs a catch can the earlier the better. The can keeps the oil from mixing with the gas, air mix keeping your octane rating at a true level. Also it keeps the intake and the back of the valves free from the deposit build up from the heat of burning oil in it. Most people won't even think of these benefits.

I put one recently because of the oil build up in the throttle body it looks better clean !!! :))

my guy always comes through with great info 👌 thanks

Great background, great music and great answers from an awesome tech!

I run the mechanical fan delete and V6 fan. I put a 192 degree thermostat and it does very well without a tune or fan temp mod. My oil temps run about 203 even on long trips. It seems to be a sweet point for me. I’ve run it in 98 degree weather but typically I live in a cooler climate to I don’t have to worry about it much.

As always, excellent series….. thanks for answering my question. 😊

Yeessss you are officially my favorite, KZfaqr , a daily driver is a 2014 dodge charger RT and when the weather allows I’m on my Z 900 or zzr 600, definitely getting that ZX 10 next

Great video!! Learned a lot!! Thanks

Thank you for the awesome videos keep up the good work bro

If it can only help, why not? I love yur vids they are on track and informative. But I am gonna keep running a catch can on my hot rods. I have see the junk it catches and I dont want it in MY engine.

I typically think catch cans are a waste of time and money, but I installed one for a particular reason. On my oldest 5.7 Hemi (05 180k miles) I removed the cats and installed new mufflers last year. After this I noticed that when I let the engine idle for more than 5 minutes it would puff out a fairly large amount of smoke when I touched the gas pedal to rev it or take off. It was just a single large puff and never smoked otherwise even at full throttle or short idle sessions. I installed a catch can and eliminated the problem

Thank you for answering my question!

Hi sir ,my name is seddig from libya,I been watching your channel for quite some time ,I was amaze how much information useful you mentioned ,I am fan of hemi engine ,I have chrysler 300c 2011 it's very fun to drive ,i love its engine sound ,very cool car ,I hope you good luck mr igniter.bye

Awesome episode and video buddy.that pipeline in background is that the pipeline Bazooka Joe shut down lol.b well

You read my question in the last episode of Ask a Tech, and I considered all the points you made regarding the 3.6. So I decided to sell my Grand Cherokee even though it had a HEMI and picked up a 300C with 52k miles. So far I am happy with my decision. I appreciated your insight and I love the eight speed transmission & the fantastic fuel mileage. Can't wait for future vids!

Hell yea very informative!

My RT Magnum came with a "heavy duty" radiator. The cars with the tow package and the police cars came with a "Severe duty" radiator which will drop in with no changes. The SRT came with a "Sever Duty II" radiator which will fit but need the larger SRT hoses. I believe the police cars also have an oil cooler which could be retrofited.

I'm sure the haters will talk shit about ur honesty which is refreshing

If you're considering the fan upgrade for the 4th gen Ram, check out John's video over at Boosted Motorsports. He has 2 or 3 vids on the swap. Couple things to keep in mind: You want the electric fan from the pre-2014 V6 Rams that had the 3.7L V6, not the 3.6L Pentastar V6. The ones with the 3.7L v6 have the same connector as your "helper fan" taht is already on the truck. One thing John states in his vid is that even without a tuner to change the fan-on temp, he was doing just fine in southern CA in the summer with very high ambient temps. I'm betting if you're towing you'd want to reset the fan temp somehow, but then if you're towing it's probably not a great idea to get rid of the more reliable/redundant setup your 4th gen Ram came with!

Thank you

What I took away from 10 years of Chrysler training was all of the techs having the same complaints about warranty and their service managers

Forget the catch can use a basic filter to relieve pressure and the oil simply drips back down into the crankcase with no harm to the environment. Any moisture in the oil will evaporate way before it becomes a problem.

Great q&a

Keeps blow by from going into manifold. Engines already have oil in them lol

If you have a hemi from 09 or later swap your oil pump out with a high volume hellcat which will significantly increase oil pressure especially at low rpm at idle then use a good synthetic oil & then oil catch can may make a difference

The oil reduces the octane ...bad on 91 only octane vehicles. Also put it on soon as possible so you dont plug your heads and valves

Mark Miller, your headers may dissipate heat a little quicker than a cast manifolds do, forcing the NGC to run the upstream AFR sensor heater more often than the NGC wants to. Try header wrap is your option, besides tune out sensitivity, or turn up the pwm at highway speeds.

I put one on my 2020 Scatpack. I'm surprised how much oil and stuff it does catch.

If you race your Hemi then get a catch can. The Ford Eco-boost engines are the perfect candidate for a CC. As for fans, I went through this for the last 10 years, if you can activate the fans with the ECU/HVAC naturally, then do it. If you have to use an aftermarket Smart relay with a Temp sensor, skip it. I have been through 3 fans, 2 controllers a battery and an alternator. ..even though I did all the math right, it takes lots of mileage to ensure everything works together right.

I own a 5.7 stock N/A manual. And also own a V6 VVT automatic challenger. There is really no contest. both are fun to drive, I prefer clutch only because I like to have control while an automatic stepping on the gas does have an advantage. As for the catch can personally it just looks good and at the same time there is no advantage or disadvantages for the mod.

Keep up the great content brotha

One other thing I thought about for the catch can. I discovered this myself -- the pre 09 Ram trucks use an internal pcv valve, so unless you mod/gut the PCV valve (And install a pcv valve elsewhere) a catch can won't work at all. I've heard the 09+ use an external PCV valve, but I haven't seen one, so I can't say for sure.

I have removed the viscous clutch fan from my hemi Ram, with no ill effects. I drive the engine hard and have not had any issues while it was removed as the AC condenser fan would kick in if temps got up. However, I do not tow frequently and live in the Great White North so it might not be a great idea if you live in Florida. I eventually swapped in a V6 Ram electric fan, a 180* thermostat and have a custom tune to keep the engine in optimal temperature for max power(not fuel economy 😐).

This is an awesome video, I run a catch can on my challenger, I think it helps but most of all it looks cool lol, however in the anal state of California they consider a catch can a modification to the pcv system and frown upon it, go figure lol, I just remove it when getting tested, please continue these videos 👍😁

on 160000km we removed heads and on every piston were soot over whole area , that was semi burned oil/carbon and it can start to glow and make knock, after that i cleaned it from pistons, heads/ports and intake manifold and installed occ and egr deleted

Awesome job brother

14:26 i will install water spray nozzles between ac and engine cooler that will spray water on engine cooler only when fans are activated. I had coolant temps 98-100C at 90km/h , with outside air temp 30-32C, if step on gas it would rise to 108C so that water should cool down it but i will have to have lot of water

I just bought a blown up ram with a 6.4 hemi and it was so nasty in the intake ports it was unreal. It will be getting a catch can with the new motor.

Do you recommend aftermarket headers install on a new Hemi to prevent future exhaust tick and hellcat oil pump as well?

Catch cans only benifit direct injection vehicles where fuel is sprayed directly into the cylinder because the blow by oil gums up the back of the valves and intake runners. But, for vehicles where fuel is sprayed into the intake runners ( behind the valves) this will clean your valves there for you don't need the catch can .

Superb job...you are a smart and savvy baller 👌

I don't know that they have any needs one, but I do know that the ls Motors should always have one, anybody who has a turbocharged engine should have one, and because it won't actually cause any damage and actually let you recover some of the oil that you would normally be lost through the induction system, and you can put it right back in your crankcase, it's probably a good idea for most everyone

I personally have worked on the early GEN three hemi and have only done a few major repairs on the later Apache head and Eaglehead hemi my question to you is which do you prefer is better? Since I’ve seen the later engines have so many failures with the camshaft and lifters but the early generation had valve seat issues it’s kind of hard for me to decide which I prefer better but I want to see your opinion.

I run that electrical fan in my 5.7 Ram and it works amazing

You are absolutely right if you are going to install a catch can on a motor with 50k miles or more is definitely use less but if you are going to install one on a new or very low mileage motor then it is worth it to keep the intake and valves clean.

I cleaned my intake and intake manifold after purchasing my 07 srt8 charger and the amount of gunk I cleaned out sold me on getting a catch can to prevent further buildup. I’ll probably do an engine tear down soon so I’m fully cleaning my block but because I got the catch can so cheap off of someone I don’t feel like I’m hurting the engine by running it.

So I am trying to make my 07 charger daytona a drag car I already have heads, cam, headers, catless, 3in exhaust, no mufflers, I am going to put on a 3.92 differential what should I do next to give it more power or the ability to go down the track faster?

Little late so hopefully you see this question. So i had to do a cam swap due to lifter failure. I put the hellcat oil pump, and lifters with an mds delete and a stock non mds cam back in my Ram 5.7. with so much extra oil pressure, do you think the catch can would benefit this scenario? I don't really have any issues but only a few thousand miles since I've done the cam. As for v6 electric cooling fan, i had done this mod a couple years back because my fan clutch was bad. 180 stat, and fan tuned to 190, it stays nice and cool at idle in traffic and was super easy to do

I have a truck 5.7 pre eagle engine and a nag1 car trans , what options are their truck wire?

I’ve had a catch can on my last three hemis. The first two were a 6.4 and a hellcat. Both had manual transmissions so no MDS. They caught a decent amount of oil. My most recent is a Ram 1500 with the 5.7 and MDS. The Ram catch can collects far more oil than the others did. My catch can will be all the way full at 3k miles. My question is, does MDS cause more oil to blow by?

Awesome video! I have a great running 09 rt challenger with pretty low mileage, would it be worth my time to do the 6.4 cam?

What are your thoughts and opinions on the awd hemi chargers? I’ve been curious about them for a few years now. I’ve seen a few 2011s come up for sale near me and I think the hemi motors sound way better than my Chevy LT I currently drive.

Just a few thoughts I had, and I completely agree Sky, if we all marched to the same drum, we'd all be driving the exact same thing and modding the same way, and it would be very boring! On the catch can, I think if you are going to leave the engine alone, then there's no point. If you are going to tune it, and are trying to get the last bit of timing on it, then I do think it is helpful. For example, many people running the Ford Racing power pack tunes for NA Mustang 5.0's actually encounter audible pinging, even when running the correct higher octane needed for the tune. Although a catch can is not required in the tune, Ford Racing actually recommends owners that have the pinging problem to run a Ford Racing catch can. Of course, some engines blow by more than others, and some tunes are more aggressive than others. I would say though, if I had a car with only direct injection, and a known problematic valve deposit issue (Audi v8's, BMW N54, etc.) then I would definitely put on a catch can if nothing else to help keep the backsides of the valves clean. I agree on the coolant temp issue. You actually get slightly higher efficiency (Power and fuel consumption) with more heat. That being said, one other way to help cool more is to increase the temperature picked up and shed by the existing system. Pure water is better than 50/50 anti-freeze mix for shedding heat, however it does so at the expense of zero lubrication properties, and also cracked blocks if you live where it gets cold. However, if you dilute it below 50%, you can get a little better efficiency. Also, you can use something that reduces the surface tension of the water (Like Water Wetter) and that helps dissipate heat slightly better as well. Of course these things will only be apparent if your existing system is maxed out. If your car can stay at 190 degrees with the fan duty cycle at 70% and the thermostat partially closed, then the water wetter isn't going to do a whole lot other than lower the duty cycle of the fan and close up the thermostat more. However, if everything is 100% duty cycle and the thermostat is wide open, and you can only hit 200, then yeah playing with the coolant concentration and water wetter might help you shed a few more degrees. But again, I wouldn't bother. On the pedal commander thing -- if a tune costs you $500 and a pedal commander costs you $300, I would say to go with a tune way more than a pedal commander because the pedal commander only fools the computer that you're pressing the pedal more (Faster). Whereas on a tune, not only does the computer map what the pedal request is and the commanded throttle, but it also is used in other calculations like if an automatic, when to shift. Also many cars now have a different "curve" for different settings (e.g. ice/normal/track). I've found that wimpy cars ramp up the throttle commanded way to early (e.g. you push pedal 40% but you get 100% throttle) in an effort to make the car feel more powerful. But on the same regard, a lot of powerful cars are the opposite, very lazy for the first 24% or so....to use less gas and fetch better EPA MPG numbers. Also on the tune, you can change things related to throttle that a pedal commander can't do, such as WOT delay, and the like.

just a note for people who want to do the v6 fan mod which i did on my truck bully dog tuners do not offer fan in/out temp changing options as of right now so choose a diablo tuner or check other tuners for that option before purchase i wasted 400 on a tuner thats practically useless for me so dont make my mistake.

Catch cans are good to use on direct injection engines helps with carbon build up on the valves. As they do not have the fuel spaying on the valves to help clean them

I have one on my 5.7 Jeep fills after about 3000 miles

What about a vehicle that see extreme angles? Like an off road rig.

My 05 RT Magnum has egr so the intake will get gummed up anyhoo

It depends, my old man. Had 2008 Ram with the 5.7 Hemi no catch can. He just traded it in. On a New 2021 Ram 1500. With 98,000 miles Zero problems ever, no ticking at all. He changed oil every 5,000 miles with full synthetic. No my wife had a 2010 Challenger R/T classic. I but a catch can on it. I change oil every 3,000 Miles, with Full Synthetic. At 3,000 miles the Catch can. Was Full all the way to the top, every time. Now my 2016 Hellcat and my 2019 Redeye WB. Both had catch cans on them. In 3,000 miles they only had, around a 1/8 of can of oil in them.

The only must have for a catch can is in a direct injection engine regardless if it is diesel or gasoline. As a commercial tech that deals with diesel engines from 3.5 to 15 liter and a few gasoline engines, the new diesel engines for the past couple years are all with their own catch and return system. The worst gasoline engines to go without a catch can are the direct injection engines gasoline, and why ford now has 16 injectors on the 5.0 mustangs since they went DI on them. 8 DI and 8 upstream. Ford learned the hard way that their DI engines intakes clogged up bad and fast. And with how ford is going down hill with their engine designs is why I traded my 5.0 Stang in for the Ram 5.7, less complicated engines to worry about in the long term. But when FCA phases out all HEMIs I will have no choice to go electric before I go DI again, unless they integrate a catch and return system.

makes me miss the days of the 5.2 and 5.9 magnums

Why cant u run bosh platnium +4 on a hemi. Thats the spark plug with 4 electriods on the end of it

Better rebuild my 2006 ram, or swap to a 6.4 hemi?

Only on Direct injected engine port fuel don’t really need them

On the Pedal Commander, would it even make a difference on a Redeye Challenger?

Different topic: What do you think about Idle RPM? Mine idles at about 600 and the oil pressure at that RPM is about 28lbs. If i increase the rpm to 750 0r 800 the pressure goes up to 42. How can I adjust the idle RPM?

What about a high mileage engine with excessive blow by? Would a catch can help or benefit me if I know I'm burning lots of oil

How does this info cause predetination ? does anybody study fuel flashpoints ? " high octane " fuel has a " higher flash point " meaning it does not ignite quite as easy thus allowing the engine to not preignite its fuel. before proper timing / compression is acheived , which will cause a " knock " called predetination . most modern engines have " knock" sensors to prevent this. So my question would be since when does oil have a lower flashpoint than gas. even with a certain amount of gas vapor is built up in the crankcase venting as well as carbon? Normally what occurs with excessive crankcase pressures is gunk and plug fowling. The theory of causing predetination makes no sense to me please explain

Aside from oil from reentering the intake man. What about the spent blowback air rentering the cylinders. Taking up space that can be filled with fresh o2 instead. getting possibly cooler/richer o2 to the cylinders

Most guys that put catch cans on a stock or mild engine just do it because it’s a fancy looking thing that is easy to install and relatively cheap. It’s something pretty that they can point to and say “I put that on there custom.”

Ok i have a question... I've shared a few posts about my hemi stroker build in my 2008 ram. Similar builds are pushing 650hp on a holley terminator from a crate. Do I need a custom ECU for this build or tis the 2008 ram one good enough? Some advice I am having trouble believing is that stock ECUs are "good to tune to 1000 HP". I have also heard that dodge ECUs are better than many others. Is there any advantage to the Holley terminator in my build? Is it just etxra expense? Can it do on-the-fly tune changes? ie from race to eco tune, without powering down vehicle? could the dodge one do that with some programming magic? If i did install the terminator, i see it has can-bus hookup... so...? it would integrate with the canbus system of my truck? throw codes on my dash, ect? would it replace the stock ECU or would the sock ECU be left in to make the can-bus system happy? I like options and features... if it can do something for me, im happy to buy it. just give me a reason....

Now for the catch can would you recommend it if the car is modified???

Pedal commander is cool and fun UNTIL it's not!! I got a little over 2 years in my 2017 RAM1500 then started having intermittent accelerating issues that had a direct effect on the transmission and shifting on my 8 speed! Would accelerate started in 4th stayed in 4th 3-35 top speed then things would be fine for a while then again thought a sensor in transmission was going bad. NOPE it was the PEDAL COMMANDER service rep told me he had the same problem in his Mopar told me to remove the PC I DID AND GUESS WHAT no more trouble. ya fun while it lasts but not that much fun to replace it every 2 years or so!!

Is there any negative effect putting the catch can on? I have '17 Ram put the catch can on and was surprised by the amount of oil in after 7k driving between oil changes! This can was installed with 23k miles on it! I changed to the electric fan love I've driven desert mountains freeways in mid summer seems to work great. I did not get the tune to change the system they scare me it's computer crap and have enough trouble with home computers! Air conditioner definitely works better gets colder quicker and works great in high temps!

Will remanufactured 5.7 heads pre eagle (08) stop the drop valve seat issue.....

I would just get a single pull spal fan!!! Look into spal!!!

An ounce of prevention is worth a pound of cure.you work at a dealership I take anything you say with an ounce of salt.

That excerpt about high rpm engines needing a catch can can be debunked by motorcycles. For example my old R6 has the crankcase hose directly attached to the air filter housing which is 3 inches away from the valves. The engine redlines at 15,500k rpm. Stays between 5 and 15k rpm in races for 30+ mins. No such detonation ever takes place.

I have a 2019 challenger rt. Does my car have a mechanical fan or electric? It doesnt look like it is physically connected to anything, so that would make it electric right?

Is your motor on the edge ? Do you check your plugs after each pass ? be concerned , otherwise let it go

Noooooooooooo it can not be true, that is me being dramatic, thank you for the information.

Crankcase ventilation systems are rapidly evolving, and becoming more complicated. Turbocharged engines are also becoming more common. Honestly, whatever you drive, hammer it hard like once a week, get on the highway, and floor it on the on ramp. Better than slow driving, and short tripping a gasoline engine is the worst thing you can do.

What about a 5.7 with 213 miles? 😆 🤣

Added the catch can 1st thing on my Challenger Hellcat. Won't help in performance initially but after 29k miles, my supercharger internals are spotless. If I hadn't installed the catch can, the twin screws of my supercharger would have been covered with residual oil residue which would affect performance of the supercharger. Case closed.

Nothing wrong with your engine burning a little oil i would only buy one if had a direct injected engine like a LT or Coyote

PCV is an emission device that was mandated in the 1960 model year. Prior to that, the crankcase vented to the atmosphere. My concern is the lack of lead in today's fuel to protect the valves, how much of that oil mist is used to provide upper cylinder lubrication. With billions spent on R&D, why wouldn't the manufacturers install oil catch cans?

Wouldn't you need two anyways? One on the pcv side and one on the intake?

It is my understanding that the oil vapor from the pcv going back into the intake effectively reduces the octane of the fuel/air mixture in the combustion chamber, which is a concern with the 6.4