Internal combustion engine breather systems are one of the most misunderstood systems there is. So simple yet so damn mysterious to some. There is absolutely no harm done to any engine that simply vents to atmosphere.

I would like to see a follow up video of after you returned the ccv to stock and see if the smoke went away

2 words that may help remedy the problem, "Catch Can" 👍

I did the this to my 99.5 PSD 7.3 10 years ago, With no problems! Ran the Hose all the way to the rear of the truck. My Intercooler is clean with no oil any were!! I now have 215 K on the truck with NO PROBLEMS!!

maybe the crankcase ventilation was connected to the exhust pipe that is why it was smoking ...

My truck has been perfectly fine with the ccv. It’s been on for years and my truck has never ran better. No leaks or anything. So thank god i am not taking your advice on this one.

Hearing a Powerstroke rev like that makes my pants tight.

I saw a test on an engine where they tried several variations of a ccv system and the engine made the last power with no ccv system. Better with a vacuum system and made the most power with a belt driven vacuum pump. Even with the load of the pump, the horsepower was still higher. Keep giving the good advice.

My 2002 was stock with 175k miles, oil coming from all the pipes etc...I had no idea what was leaking and what wasn’t lol .. did CCV mod cleaned up the engine and fixed the found Leaks and seals and gaskets and hoses etc...

im haveing no problem I did my own bulletproof just sent my heads to my machine shop to do O rings and bronze valve guides I'm putting out 650 horsepower towing a bobcat everyday for three years now still no problem Bill did help me with alot of his knowledge thanks

Not sure about a 6.0 but on a 7.3 the ccv mod causes no problems. In fact the International T444E (same engine as a 7.3 Powerstroke) used in commercial trucks has the crank case vented into the air.

Bill, I love your videos! I'm going to diesel tech school right now, and every video I watch, I learn something new. I've been watching your channel since 2012 and I've learned a lot in that time. thank you so much and I look forward to watching them in the future. Hopefully I can get a 7.3 or 6.0 within the next year.

Some of us live long enough to realize the manufacturer does know some about what they build.

I understand what you're saying, but I have seen diesels that vent the crankcase right to the atmosphere, (i.e.: Cat C7's and DT466's), so how do they get away with it?

Bill, do you consider it a bad idea to do the CCV reroute on the 6.7 powerstroke engine as well? Just wondering as I'm considering doing it but really don't want to deal with these issues if this is the case on the 6.7.

I would love to know how you could explain how all the turbo chargers since the beginning of time on diesels with crank case vent venting to the outside survived if this is what’s causing your turbo problems.

If CCV is helping your turbo not leak past the seals, your turbo is already fucked

I have to say i don't understand why it would make the turbo seals to leak.

I have always been impressed with your mechanic skills and your knowledge and I have enjoyed your videos, most of them are full of great information, until this one. my last truck was a fully deleted 6.0 and my family's company has 6 of them. I've done this mod on all of them, and I think it's an excellent mod. It keeps all the intake tubing dry and clean of oily and dirty debri. We I have always had a problem with oil seeping out around the tubing in various places and as soon as we did this delete we quit having an oily mess both inside the tubing and outside the tubing, how can that be bad? As as far as vacuum needed to suck that stuff out of the crankcase, that's BS there is plenty of pressure built inside the crankcase to relieve itself there's no need for vacuum or sucking of any kind to get the pressure and oil out of the crankcase. And if this is such a bad thing to do on diesels then explain to me, while right up until emission started to be a big deal to SOME, diesels all over the place vented out of a vent tube that dumped right out below the motor, they were all set up that way. The Cummins in the Dodge pickups dumped right out blow the motor up until mid 2007, all your tractors farm equipment big trucks forklifts and such all dumped out right below the motor straight out from the crankcase similar to the vent setup you have in your video and if it wasn't for the EPA and their bull crap and all the emission talk about the planet burning up, the crank vent tubes would still be dumped right out underneath the motor instead of recycled through the air intake.

Usually this guy gives good advice but this time is no bueno...He even states "9 times out of 10 the leaky turbo stops after we re-route the PCV back to stock, I don't know why that is..." - then you shouldn't be commenting on it Bill. The only reason FoMoCo routes the PCV this way from the factory is for emissions. The small amount of vacuum is negligible at best in evacuation the crankcase and that 5/8" ID hose vented to atmosphere does a fine job. Not happy with that? Weld a bung in the exhaust and have it sucked out that way. Vented externally, you clean up the intercooler (increasing it's efficiency) and don't have oil seeping out all your charge pipe couplings, as well you're not caking up the backside of the intake valves (assuming you have an EGR delete done) and pistons by burning this condensate.

You said increasing this crankcase ventilation puts stress on the turbo seals. I assume you mean the increased crankcase pressure? Which by the way I don't believe would be an increase or a problem at all. But my question is, how in the world would that pressure affect turbo seals? The turbo return oil drain? No way air pressure is traveling against returning oil. And no way there is such an increase in crankcase pressure just from leaving the ccv hose open to atmosphere. Unless it's plugged up or kinked, there will be no problem.

CCV mod is very good. Just be sure to use at least a 1" diameter hose at a constant slope. This reminds me of the snake oil comment persons that railed against additive such as Arch oil and Revx. Come to find out those mechanics and followers of those mechanics comments, or as I like call them peanut gallery followers, couldn't have missed the boat more. Yes it cuts into profits of unneeded repairs and perfectly good solutions to not spend thousands of dollars plus extra down time towing etc. If doing any mod or using any additive, take the up front time to investigate why it works and how. We know using snake oils can work if the problem is fixable by that science. By using the thought of suction removes more blow by, then one would have to worry about to much suction. That could suck more fuel into the oil pan diluting our oil with fuel much quicker. I am not saying the EPA system to scrub the emissions does that. Of course we all know the EPA doesn't care if their approved systems ruin our engines faster or not. So if you do the CCV mod and it causes your engine to not vent properly, Then you have not done it correctly. Check hose size. 1" diameter works real well with my SCT tune on heavy tow and make sure it runs out at a constant slope with no kinks so it doesn't create a pool of build up oil clogging it. I also added Ia notched on the dump end in a forwards facing V. This does create suction with forwards movement. I learned that years ago while having some work done buy a shop working on my 379 Peterbilt by simply asking why the hose was that way from the factory and noticed other trucks not. If you still have problems after that you have another issue. Do it right or don't do it at all.

I totally agree. A catch can is a way better idea. Use them on ls1 and ls3 all the time.

Stupidity could end up with you having to hire more people to handle more work.

I had an 05 6.0 hat I vented to atmosphere and the hose got kinked making it white smoke profusely. I believe people restrict them too much sometimes when they vent them thus creating pressure inside the crankcase and thats why they smoke. Restricting a ccv will make them blow seals. Just got my second 6.0, a 2006, routed it to atmosphere using the stock fittings and a length of 1'' heater hose. No problems so far. Just don't choke it down and you'll be fine.

a crankcase ventilation is used to prevent pressure build so your orings wont leak cause of pressure build up right? so if you disconnect how is it harming it if its still relieving the pressure air will flow in the path of less resistance right? so how would it have any bad effects to the orings if its still relieving the air by pressure?

You are right I would leave it stock in a diesel. The gassers with direct injection have issues. My buddy has a Mini which oil from his intercooler slosh into the combustion process, create unexpected combustion, and the sensors would detect irregularities and throw him into limp mode. He added a ccv oil catch can to catch the oil, but the gasses still fed into the turbo. He empties the can about every 10k, so far with 30k on the mod, hes been problem free. My guess, is this is crossing over to the diesel side where it isn't as necessary.

I've always wondered about the crankcase pressure issues this might cause. I don't have as much of a problem if someone uses a catch can to reduce atmosphere venting, but the vacuum issue, im curious to see. Might do a little test by watching venting from oil cap, see how much the CCV pulls through its path. GOOD ADVISE BILL as always.

does the turbo require smoky blow by oil to stay alive. or the seals just give out cuz of the tad bit extra crankcase pressure that occurs when vented to catch can

I have my plumbed to my exhaust. Still creates a vacuum but no oil in the intake. Watch Anthony Youngblood from super duty service, he does it on all his builds.

Wow - get a shovel cause this is getting deep. All venting the ccv to atmosphere does is keep your truck out of this guys shop. I think that is a fine idea.

The problem I have with the CCV system is that the oil vapor mixes with the recirculated exhaust gases from the EGR and coats your intake. Makes for a gummy mess.

My 6.4 started blowing heavy white smoke as soon as I added the catch can to it. I checked everything under the hood out and it all led back to the ccv delete. I put it back to stock and took it for a test drive. All the white smoke stopped and the excessive blow by is now gone

Do you guys do any kind of financing on repairs and dealer proofing?

300k and never missed a beat, always vented to atmosphere....

Question if you removed it replaced it with a catch can and left it plumbed the same way what do you think

Awesome vid!! You just stopped me from doing that mod!! Thank you!!

So what would you guys suggest we do if we are having problems with cac hoses popping off? I feel it's related to the oil in the intake system

hi Bill I have this modification on my truck however mine is more like a catch can that I can drain it's still hooked back to the intake pipe do you think this would be ok or should I do it with my catch can

Your a smart man so i dont want to argue with you so lets talk about crankcase vantalation going into the vains or fins of the turbo. The turbo is a finly machined instrument now your going to gum it all up with engine goo sticking to it. Then your going to mix contaminants with your perfictly clean fuel air mixture causing poor combustion and poor emisions to repiet its cicle of poor fuel mixture

I guess the vacuum in the crankcase does a pretty good job at the turbo. It sucks at the chargers drain line and reduces effective oil pressure at the turbocharger bearings. Positive pressure in case of bad ventilation would be really bad and even increase the pressure there.

The intercooler is designed to have oil blocking it up? 😂😂😂😂

i have to say i did ccv delete on 6.7 cummins. it runs awsome just straight draft tube. i do think the delete kits with small 2 inch filter on end are bad idea because if they get plugged then pressure will build in crankcrase. but my truck has been running great with just a hose to atmosphere

Got a little black smoke on a mild take off. Go to tuner roll back low presure fuel by 1. They are pre set to 3. So a setting of 2 should keep the black down just enough.

All I know is I did this mod along with adding a bypass oil filter and changing out all of my fluids. Within 2 hours of running, I was leaving a cloud of white smoke behind me everywhere. I was freaking out, thinking that I had a bad injector. Then I watched this video and returned my CCV to stock and it is smoke free and running like a champ! Thanks Bill!

Lets find a way to keep the turbo boots from blowing off then. Most people do the ccv mod because they are tired of the oil that soaks the boot.. so once someone invents a bullet proof boot upgrade we all would be very happy

Good thing mishimoto just fixed that issue 😂😂

I lost brain cells watching this

Glad you put this out there. I was going to do it this weekend on my 02 7.3

I had a 7.3 I bought with a (massive blow by issue) when I looked at it got 3000 bucks off just to see The vent at the end of the hose under the frame was blocked with A OIL BREATHER FILTER CAKED AND CLOGGED WITH TRASH. Routed it back to the proper spot and wasn’t a problem I even noticed on intakes that most oil leaks start after cold air intakes are installed so when I bought my 7.3 excursion last week all I did was put a k and n repellent filter in the stock box.

love your videos brother.

Guys- he cant and won't tell you to void the warranty or bypass the emissions on your Powerstroke. His job is getting your Powerstroke back on the road. Notice that I didn't say "fixing" your Powerstroke. If every Powerstroke Diesel was fixed and modified to run the best it can with all of the best mods then he would be out of a job. This video is laughable. You can almost hear him snickering that the CCV delete is a bad idea.

This theory makes no sense everything piece of equipment I've seen vents crank case vapors to atmosphere. Never hurt a turbo

I did this in my 6.9 idi I heard it caused it to blow my head gasket so should I put my cdr valve back on?

I have a 2004 6.0 and I have an excessive amount of oil in the tubes as well as pooling on top of the engine,so much it is coming out on to the hood.I can't see where the leak is coming from. The engine runs fine. Advice?

I got NO TURBO; what happens if I disconnect the crankcase breather on my V6 from intake housing and let it hang downwards on its own.( but I plug up the air intake housing hole).. will it affect the engine?

Mine is stock. Just saw I have some blowby with a little bit of puffing pressure. Is that normal? Doesn’t blow oil cap off but just a couple months ago I had none.

Plus in the great salt belt when winter comes around the moisture in the CCV will freeze and can block the line up. That'll blow out all the seals in the motor in a hurry.

Thanks for da info, wasn't really sure if I needed to do that but now I'm gonna leave it as factory, got any advice on EGR delete, dealers ask if mine is deleted, does it really help & any downside to this

I just bought my first diesel. 1996 F250 7.3. I thought I had a really bad engine leak cuz smoke was coming out underneath my driver side. I follow a hose up that's just blowing out smoke and it appears to be this ventilation on top of the valve cover. The owner put a d66 turbo on the engine. Don't know if that's an upgrade or replacement. Is there a place to plug this hose into that style of Turbo? I really don't want to suck fumes all day

If the green O-ring or the hose has a leak, can it cause a P0401 CEL code?

I bought a 2000 School bus with a T-444E(190 HP) in it, that has a RACOR device on top where the CCV hose comes out.. from this RACOR there is a hose going to the Intake Past the Intasle air filter and Before the Turbo, are you familiar with this deivce? or should I take it off and replace it with a stock CCV hose? Ive not seen one of these on a bus or sure what its purpose is.. although I do know it leaks oil around the base of it so ive got to take it apart and see whats leaking in that RACOR..

the difference with mine is I have a catch can which catches the oil and I have no problem with the truck before I did this it was so much oil going through the pipes they used to slip or even changing new ones and new clamps with the proper torque

bs on it blowing the turbo seals... older heavy duty trucks and off highway engines vent right into the atmosphere... the recirculation is purely for emissions

i loved this video. you should do another one entitled, "dumb shit customers do to their trucks." Or start another channel of daily rants, you can record them when you're test driving trucks!

Bill, you are partially right here. The crankcase vacuum is important as gasses do get past the rings and into the crankcase. The gasses that get into the crankcase are not good for nearly everything in there. Over time they will react with the various metals and oil, as well as dilute the oil itself. The CCV is a simple way to ensure a moderate amount of vacuum sucks out the denser gasses which could otherwise settle and not be able to escape. Ford should have put an air oil separator on these trucks. Anybody who has a high horsepower Subaru knows this as well: up to 600hp or so, most air oil separators will route the vented gasses back into the intake. IAG's competition series AOS does not, but the disclaimer specifically states that oil change intervals must be dropped to around 1,200mi or after every race, because of oil dilution.

i did the ccv mod and i had put it to my down pipe at an angle and it works great.

I hear what ur saying and I understand . But this video looks like a 6.0 or a 6.4. My question is , would ur opinion on a CCV mod apply to a 6.7 differ ? Thank you .

A voice of sanity in the wilderness! Thank you for sharing your experience/wisdom!

Hi, (1999.5 7.3L) My Turbo Pedestal Small O-ring fell into the Hole next to it while upgrades.. I was distracted and I saw it fall in to the return hole. What should I do? Any help please :( I used an endoscope and nothing..

because how else would he get paid

Take a 6.7 CCV filter out and pick the material apart. I doubt it's actually relieving pressure in stock form either.

I believe that the international VT365 engine is vented to the atmosphere not the intake. Only thing different is emissions on different truck classes.

Bad idea on a diesel with a turbo. Is it a good idea to modify Crankcase ventilation on an older gas engine?

what about the 6.7 powerstroke with the EGR caking up? any advise on that? do you recommend that CCV delete on those?

As much as I love PSH videos, it's worth noting that the 7.3 was not a "Ford" motor. But you know that. If you haven't taken the time to look, look at some of the REAL 444E applications. DT444E from Australia, maybe in a BUS.. Real heavy GVW rigs.... Many have crank venting through a separator can & out behind the engine, or straight our down the bell housing... Any that DO vent into the intake are FIRST run through a air/oil separator can so IT DOESN'T FILL YOUR INTER COOLER WITH OIL ! A leaking turbo seal is just that, LEAKING! Just because applying vacuum stops the leak doesn't determine it was the CAUSE of the leak. Hell, maybe your blow bye is shooting your dip stick out, but when you hook up the CCV vacuum up, you just FIXED the blow bye ? Light neg vacuum can keep a slight leaking gasket from dripping, but there not related as cause & effect You will NOT build pressure in a crank case by venting wide open .. BTW, Aviation engines NEVER gulp filthy crank case gasses, they always vent to "atmosphere"

If this is true, then why does every VT365 I have worked on vent down by the bellhousing? How can an 06 dodge Cummins 5.9 vent to atmosphere "safely" but a 6.0 can't? every other diesel engine/manufacturer on the planet goes by the rule of , if there is oil in the CAC system, then something is wrong.

What about putting in an line catch can to collect some of the oil? That way you retain the vacuum from the turbo but maybe filter out some of the oil?

Statements, and a Question! Statements: My coffee cup doesn't get sticky or weird, until sometime after I stop adding fresh coffee. If it were day one, I would vent my 7.3 to the atmosphere! However, right now (per my inspection of an intercooler pipe) what I have is Clean, Wet, Fresh oil... presumably throughout, the affected components, but at the very least, downstream of the turbo--which I'm okay with! If I stop refreshing it then, it will be moving toward Old, Dry, Dirty junk. Question: Am I crazy?

Bill, why would you need to replace the turbo if the seals blow? New seals come with every single rebuild kit.

@powerstrokehelp Bill, you mentioned you weren't sure why hooking up the Crank Case Ventilation system to the turbo intake fixes the oil leak. The answer is physics! By creating a slight vacuum on the crank side of an engine, air is drawn into any small crevices to equalize the vacuum. With the air being drawn in, the oil isn't allowed to leak out. Without a vacuum, the oil is free to leak out of any seal that cannot hold back the pressure Fun fact for ya

I did the ccv reroute on my 97 7.3 and it immediately went to smoking. It started to drip oil out the tale pipe. Put it back stock and stop smoking so in my case he's right.

Let me try to get you to answer me one question because you never return my comments, do we have to clean the factory ccv system and how? Thank you sir. Great video like always.

how would that cause the turbo seals to fail?

Just wondered if these CCV re route kits were a good idea.

Hi I have question I have 2002 f550 CRANKCASE VENTILATION is liking oil on the litle pipe gon to de air filter and turbo I see litle oil on the turbo the pipe from air filter to the turbo I see oil I have to change CRANKCASE VENTILATION filter because went the truck needs power the truck lost power and smoking inside the cabin or on the air conditioner the temperature is ok oil thanks

Just gonna throw out the fact that big rigs vent crankcase to atmosphere. Look under any big rig, they have a hose that usually hangs under the front axle.

What about the 6.7 Powerstroke? I think the CCV is a major culprit in pushing out the upper oil pan seal. Causes to much pressure in the crankcase, and boom, you’re blowing out seals.

What do think about the pedestol delete 7.3

I like how you're a straight shooter tell him like it is way to go there old school!!

I think the reason turbos start to smoke after doing the delete is because vacuum from the turbo helps assist in the draining oil from turbo as it passes through. When you remove that assist it doesn’t flow through as effectively letting it pass through the seals “metal seals”.

Thank you!

On my 95 7.3 the blow by pushes up my dipstick. But my motors only has 136000mile and it runs great so I'm pretty sure my crank case ventilation is clogged or something but I don't really know anything about it so I don't know how to check it

I've heard the exact same thing from diesel mechanics that I know & trust. I won't do it to my 7.3 !!! Thank you.

How do you feel about catch cans?

so i need some help figuring something out. im looking at some box body ford diesel trucks within the years of 1990 and 2000. im not looking for something for pulling im more of looking to make a drag racing truck. im gonna get a 7.3, i know alot about power strokes but honestly i really dont know much about the IDI diesels. so im just trying to figure out what would be a better pick for me, the 7.3 powerstroker or 7.3 IDI. i want something that will have alot of parts options online and i dont wanna be constantly repairing small parts on the engine.

Bill, I have watched alot of you video and most I tend to agree with you and think you have some good ideas. in this case I tend to disagree and this is why. if ccv is so good then way do 99% of big rigs and military vehicle run it? also a ccv mod can be totally harmless and not create any leaks. what people tent to mess up is they run fitting or elbows or even hoses that are too constricted thus cuasing too much pressure and the oil leaks out of the path of leas restriction I.e. the turbo. or when people use catch can same principle too much restriction. if you do ccv mod on any diesel the hose and fittings need to be at least 1 inch inside diameter.

Damn, he usually knows what he is talking about... not this time!

2011-2016 Ford 6.7L Powerstroke Baffled Oil Catch Can Kit Installation by Mishimoto good or bad

I love my 7.3 powerstroke but wish ford put an intercooler in the econoline chassis