6 Symptoms of a Bad PCV Valve

[@MechanicBase]

Did you fix your car issues? Let us know in the comments below how you did it, and maybe you can help someone else with a bad PCV valve! Don't forget to like the video and subscribe to our channel! More PCV Valve information: mechanicbase.com/engine/pcv-valve-symptoms/ Website: mechanicbase.com/

[@chrisjones5352]

Hi my breather is blowing out air

[@ramonlv2475]

How can I find the PCV valve in my 2015 Mercedes Benz GLA 250 4 matic

[@spearmintaltoids9889]

I have a quick question, I replaced my PCV valve today and it worked perfectly and fixed my engine problems for about 10minutes but then suddenly my Bronco went straight back into the same sluggish mode that it was in before I replaced it. Why do you think it did this? Should I have replaced where the valve connected to the intake? (1986 Ford Bronco Eddie Bauer 302 EFI)

[@jannyoakley6514]

2006 saturn Ion 2.2 pvc valve location, any ideas? I'm a widow and not a mechanic but have had to learn to do things so any help is certainly appreciated!! Thank you

[@Pscion155]

these symptoms sound right for some problems ive been having, on bmw 2008 x3 3.0L, i understand it has in the past had a recall on the pcv valve, im worried the replacement was done wrong as in the US many mechanics (even at bmw dealerships) tend to do things totally wrong on these cars. do you know offhand if my vehicle pcv valve is built into the valve cover or separate part i can check?

[@unebonnevie]

Excellent explanation on the the purpose of the PCV! I guarantee that most mechanics wouldn't know this! Mechanics nowadays simply replace parts until the symptoms go away!

[@rondog540]

I had a crack in the PCV hose on my HK Barina that I missed for a couple months - causing an initially very subtle but increasingly rough/high idle that would eventually either stall or get stuck at around at 1.5k rpm and lose acceleration altogether until the engine was switched off and on after a 5s wait. This video was a great help.

[@jy-no4vq]

I bought a car that was blowing a light white mist through the oil dip stick when I tried to check the oil.(while the car is running/on) Also light oil mist pushing up through the oil cap/oil refill cap when I take it off.(again while the engine is running. I for sure though the piston ring seals/ head gasket was blown (but no white or cloudy oil in dip stick). I bought the vehicle anyways thinking I had to change the motor. It turned out to be just the pcv value was stuck and it was all I had to change for less than $25. Bought the vehicle for $1000. The vehicle is still going for $5-6k. Man I hot lucky.

[@jy-no4vq]

I hope this helps some one out there.

[@Stainless316L]

Should the pcv be closed at idle not venting. ?

[@canelocarranza]

Great video, thank you, you saved me thousands of dollars of unneeded repairs that i was planning but it turned out that my pcv valve was stuck closed and this video was all the only info i needed to figure that out. Thank you

[@tripledelight8104]

PCV Valve on my Honda cost less than 5 bucks, took me less than 5 minutes to replace. I cleaned it with carburetor cleaner offen as I can.

[@dartmango]

My 2008 Honda crv 2.4l had issues with a lean bank 1 and ran rouph at a stop and fuel mileage was horrible. I found a collapsed PCV hose and changed the hose and PCC valve. The car long and short term fuel trims went back to normal withing 10 percent of each other and fuel mileage improved with smooth idling. If Pcv valve is closed it increases crank case pressures and could cause oil leaks out of the rear crank bearings, oil pan head covers and sludge up your engine. Small part big problems. Check it and make sure it's working properly. And please don't vent to atmosphere. It's better to have engine burn it clean then to pollute air even more. I also had to clean my throttle body because the dirty air clogged everything up. I had just bought this car used and must have been like this for a while. All good now. Thx

[@gwendolenmccloud8771]

First, you have a great voice!!! Secondly, thank you so much for posting this video!!

[@sarinsarin7898]

Thankyou for taking the time out to make this video. I do my own maintenance's but for a novice that was very well explained and not complicated to understand bravo sir. 👏👏👏

[@Alfred..E..Neuman]

I love the hand tutorial given with both the left and right hand! 👌🤚🖐️

[@RED97761]

Well informative video. I know too much about PCV but your video added even more information to me.

[@peterrudy9207]

I think best to prevent the PCV Valve from getting clogged up . Is to have routine oil changes every 5-6000 miles with a new filter . And to use a detergent based engine flush such as AmsOil or Liqui-Moly each time .

[@MechanicBase]

Yes, doing regular oil changes does help a lot, @peterrudy9207👍👍

[@xxmeanyheadxx]

liqui moly all day engine flush, intake cleaner, ceratec every oil change

[@dvvaughn564]

3500 miles

[@dimicharitidis3725]

Thank you very much for your help! Your video is very well put together in all aspects! 💯 ✊🏽 🙏🏽

[@Plasmo20]

Good video, thankyou. I have a 2005 LEXUS IS200 that my daughter drives. 190,000kms. When cold start in the morning I see a small amount of light grey or white smoke at the exhaust for maybe 7secs only. The engine has begin to use oil, we have added 1L in about 6weeks of daily commuting 50km round trip. I am thinking Valve seals but another suggestion was the PCV on the IS200. Your examples do not match my case however I am interested to get your opinion/guidance. We are in SEQLD, Australia with Summer temps in the 25-35deg C. Naturally I prefer the PCV to be the problem as replacing the valve seals is a harder job than on old cars. Cheers

[@pattywoo1061]

Great video - very helpful to a complete novice!

[@PlanB-3751]

Thank you for your very informative video bro👍👏 I have an Audi A6 2008. Vehicle: Audi A6 C6 4F 2.0L TFSI 2008 (4 cylinders) only one bank. Only P0171 no other codes. System too lean at a doe bank1 Freez frame DTC : P0171 Engine load : 20.8 % MAF : Air flow rate. 3 g/s RPM: 742 Fuel rai pressure: 688.92 psi Short term fuel % trim : 3.125 % Long term fuel % trim : 0. % Fuel / Air ratio : 14.63 % Any idea, appreciated. Cheers.

[@Spoot401]

I had anti-freeze constantly bubbling up and getting all over my cylinder covers in my Crosstrek. I've taken it to a mechanic, and they told me that the PCV valve was busted and had sucked oil into everything, and the oil had caused a lot of tubing to crack and break. Estimated cost of repairs would be ~$1000 (all while saying there's no guarantee it would fix the issue). They also told me this could have been caused by an oil pan leak (Subaru gonna Subaru), and they gave me the estimate of $6000 to fix that. I'm thinking on just having the PCV valve and tubing replaced because that seems to be the most likely candidate of what caused the issue (and on a vehicle w/ 127K miles on it, I don't think the PCV valve had ever been changed). And if the oil pan is leaking, it must be a small leak, because I don't see oil on the ground, so it can leak a little while longer for as much as I care.

[@joesalemi2414]

This video was very helpful. Thank you so much. My 2011 5.3v8 Silverado has 178k miles. It burns a little oil. I use it mostly for long long trips of 250-2k mile trips. I cruise at 80MPH sometimes in Mountains. I want to avoid a ring job or blowing various seals…. I don’t have any symptoms of a blown PCV except oil loss about a quart every 3K miles. Also oil is black at about 3K miles. I think I should replace the PCV as a preventative measure. What is your opinion? Thank you.

[@MechanicBase]

I would definitely replace it. This is a cheap part, and the job is not overly difficult👌

[@peteloomis8456]

2011 shouldn't have a pcv valve because it uses a special breather that's in the drivers side valve cover that separates the oil from the blow by fumes and there is a upgraded valve cover for it that you can buy for it because there was a tsb on this from 08 models up that were having issues of to much blow by clogging up the throttle bodies on these engines . Also if your AFM auto fuel management system is still turned on that shuts cylinders down to conserve fuel and get better fuel mileage these engines had problems of those cylinders 7&8 I think it was where when they are shut down to much oil gets sprayed from the sprayer in the oil pan that sprays those cylinders and what happens is it's too much oil and after a while this oil turns into carbon that gets into the oil control ring lands on the pistons and what happens is the oil control rings get stuck in the ring lands instead of being pulled out to the cylinder walls by the cross hatch marks from the honing process when the engine is built at the factory and the honing process is what pulls the compression rings and oil control rings out of the ring lands into the cylinder walls so it builds compression. So once those oil control rings are stuck in those ring lands you get more blow by and oil consumption because the oil rings aren't doing their job of scraping excess oil off of the cylinder walls on its way back down . Try the valve cover and if I were you buy a Diablo sport tuner that lets you turn the AFM off or a Range disabler that turns the AFM off that plugs into the OBD port on your drives side just under the dash . I was have the same issue and did the upgraded valve cover and shut the AFM off and less oil consumption and the trucks instant fuel economy gauge in the dash says I'm getting only a 1.5 mile less fuel mileage with all 8 cylinders working . The other thing is if you leave the AFM on eventually you will have lifters that will fail because when the VLOM that's under the intake valley pan turn on and then cuts the cylinders back those lifters aren't being lubricated and they will fail and can do engine damage to a point that the engine is junk and either has to be rebuilt or a different good running or new crate engine installed . There was a lawsuit against GM on this but the judge tossed it out and probably was paid off from GM to do so under the table and a lot of people were having major issues with these engines . This covered the 2008-2012 models but now there is another lawsuit that is for the 2012-2021 trucks with the 5.3 engine that are having the exact same problem but if the people's lawyers win this they will be the ones that get most of the lawsuit money and the people who wrote their names down to add to the lawsuit they won't get enough money from the lawsuit to even fix their engines or have them replaced by GM . The only way GM did any repairs on these engines is it the truck was still under its 5 year 50,000 mile warranty or if the person who bought the truck had bought the extended warranty and GM would honor that but nothing past these . They make AFM delete kits that come with a new cam and roller lifters and lifter boxes plus the head gaskets and pushrods and needed plugs to plug the oil ports off from the VLOM so the engine runs with out the AFM runs on all 8 but after this is done you need to send the computer into have the AFM shut off internally or use the Diablo sport tuner or the Range disabler but once done these engines actually run much better than they did from the factory and make more power . GM also made a oil diverter that shuts that oil sprayer off and takes that oil and sprays it towards the oil pan sump where it should be and found out that spraying all that extra oil in the bottom of the engine specifically at cyl 7&8 that wasn't a good idea because it was causing the mentioned extra oil consumption and blow by because of the stuck oil rings .

[@joesalemi2414]

@@peteloomis8456 wow thank you so much for this deep explanation. Well said and thank you for your time. I’d like to turn off the VLOM but the dealership warns against it. Also, I am a bit confused about the Diablo system. If I do that will I have to replace the rollers and plugs and all? Or are you saying that the actual modifications cause further problems and to just do themDiablo only?

[@AChavez-p5k]

Verygood

[@tamarawarrick8212]

Ty for taking the time out to make this video to educate us❤❤

[@dleblanc3592]

Thank you for posting this video. My truck has all six symptoms. I changed out the knock sensor. I did a full tuneup. I replaced the mass airflow sensor. I replaced oxygen sensors. Tomorrow I will be replacing the PCV valve and I guarantee the truck will be normal again.

[@derriesebean327]

Did this work for you

[@jedidiahshilts7152]

Well how's truck running bra

[@syfodias-jedimaster]

How did it go? Did the pcv fix it??

[@mrcompfident6916]

How’d it go?

[@tgvoaden]

The best video I have seen re the PCV ,,well done and thanks. on my way to see my local auto electrician, I think the valve is in the rocker box so expensive.

[@jagathchristopher4103]

Great video, These tips and tricks are very helpful to car owners. Thank you very much.

[@MechanicBase]

Thank you👍

[@benfel9403]

This is just the video I was looking for! I have a 2007 Audi A6 C6 with a 3.0 TDI. For a while there has been an odd unburnt fuel smell at the back of the car when warm and idling (not when cold, no smell or smoke when cold) or when has been sitting in traffic, only a puff of smoke. Does not consume oil, no check engine light. Noticed where one pipe leaves rocker cover and feeds back in at turbo, both areas now have a light misting of oil (sweating not soaking everything) has felt OK for most part, pulls hard and smooth, returns good gas mileage, starts fine, idles fine, but about three times felt the slightest fraction of a second hesitation. Can I ask does this sound like a stuck open PCV valve from what you have said, or a failing one. Car is on 180,000 miles. No excessive oil puddle inside intake area where breather feeds back into intake. - I have a funny feeling the PCV valve will be burried in the V on these engines :) Any thoughts would be great as a starting point, great video thanks ! Ben.

thnx for ur info. keep up the good work. What would cause an engine to not feel smooth in the steering wheel, while when running? NOT a vibration, just a weird, not so smooth feeling in the steering wheel, as it use to feel. The vehicle running great, but is 15yrs old with 195thou miles.

[@guysmith6616]

Power steering fluid? Loose belts? Front tire issue?

[@johnmcnamara4846]

Thank you. Straight to the point video.

[@MechanicBase]

Thank you🙏

[@knolez1546]

Mine involves removing the valve cover to remove the CCV breather bung. Instead of doing that I added a cheap catchcan. Problem solv-ed.

[@chuckwalla2967]

How do symptoms differ if the valve is stuck closed or open?

[@sollykhan2385]

EXCELLENT tutorial, Thank you, please post more wonderful Videos, 🙂

[@kolankprof]

Great overview and diagram! Thanks for the thorough explanation!

[@spiritedguy2]

Appreciate the video. I'm a new BMW owner, changing my PCV/CCV on a 2004 525i M54. I see all the PCV related parts and hoses on the intake manifold side, but where are these cylinder/crankcase gases that are transferred over to the intake manifold? I see no pathway to the intake, just pathways circulating around the intake. Also can you discuss what is a proper amount of vacuum, all three ports on the back of my intake are plugged off as well as the small vacuum port on the PCV valve. Then there's the Y shaped jet sucking pump system connecting to the brak booster, to underneath the intake manifold, and a vacuum line to the air intake boot attaching to the throttle body. Really

[@MechanicBase]

You need to remove the plastic cover that sits on the intake manifold. Underneath it you'll find a black plastic rail, with nozzles going into individual intake runners. That's where the oil fumes are vented into the intake. The PCV sits below the intake, and it's difficult to reach it without removing the intake.

[@MrNamePerson]

Hi. Great explanation. Can you help me find the PCV valve on my 2003 or 4 Lincoln Town car?

[@edsonherald3720]

Many Thanks For The Excellent Class ! 👍🏽👍🏽👍🏽

[@09Youba]

Thank you for the video. I have a 2002 Volvo S60 2.4 Turbo. I replaced the spark plugs at first it started up right away. I do smell gas fumes . I put some engine and carburetor cleaner and ran it on the Highway. It runs great on the highway with plenty of power. But after shutting off it take 2 or 3 turns to start. Do you know the location of the PCV on the 2002 Volvo S60 3.4 Turbo. Thank you for your help.

[@teamaustralian]

Greetings from Australia! Brilliant presentation 🎉 Is it possible to clean the PCV valve in an Ultrasonic Bath?

[@MichaelsPaintingChannel]

Can you help me. I've a BMW i116 n43 and have a rough idle but only when cold. Could that also be cause by this? Changed spark plugs, injectors, coils and nox sensor. Errors say it's lean, but also too rich..

[@charlespratt8663]

PCV are generally cheap to replace. Use the factory part if available. They can also be cleaned with a couple shots of degreaser or brake cleaner after removing from engine.

[@abdouallahuniverse5689]

And also the problem could be the pcv valve grommet ( it's bushing), bad grommet will cause vacuum.leak, so you need to change both regularly pcv an its grommet .

[@robertmacdonald5198]

Hello. Hello. I have a 2004 volvo xc90 which is displaying symptoms of a bad PCV valve as described in your most helpful video. Could you please help me to find the PCV valve in my car? Thank you. Robert.

[@MechanicBase]

Which engine does your volvo have?

[@jodytho]

great video. clear information and instructions

[@dmghuncho8601]

Have a 96 grand marquis replaced valve cover gasket on passenger now it idle a lil ruff n act like it wants to stall wen I put shift to drive could this b a pcv value going or have gone bad

[@SilverioRamirez-d7n]

Thank you for great explanation. Excellent Presentation.

[@MechanicBase]

Glad to help🫡

[@jonathansakers6453]

Would a bad pcv valve cause oil to get into your exhaust system through your air intake and turbo?

[@MechanicBase]

Yes, it can. Because of excessive pressure inside the crankcase. Do you have white-blue smoke coming from the tailpipe?

[@robertswift6101]

@@MechanicBase i have blue smoke only at start up on my 2007 mustang gt with 50K original miles,,,i dont think the pcv valve has ever been changed..is the pcv valve the cause for the smoke or bad valve seals?..i changed my oil every 3-4K miles

[@maj8301]

It probably IS the pcv valve. Change it. It is cheap and easy to do.@@robertswift6101

[@MartinMotaung-g8d]

Hi guys, where is the pcv situated in Toyota runx

[@johnjordan4716]

Excellent video. thanks. Driving an audi 80 tdi with a 1Z engine, giving grey smoke and idles rough when engine is hot. No warning lights on such an old car. Could this be PCV valve issue?

[@rickylee2477]

Vacuum leak

[@jamiebergamine1012]

Can you tell me where the pcv valve is located on a 2017 ford fusion titanium 2.0 ecoboost?

[@PANTYEATR1]

If you do an engine swap and increase displacement from 5.0 liters to 7.0 liters, should the PCV valve be upgraded or enlarged for the bigger displacement engine?

[@jaymesbenny7346]

Thanks for the information, but I don't know how to locate mine. I have a Nissan Primera 2000 model

[@malahkhesus482]

Can this mess with jerking while accelerating like it's congested and cause the car to be in the wrong gears or would that be my vtg transfer case oil wear?

[@luaikadoura3152]

Hi, I actually have some crank case breather hose , that constantly splits apart. It cracks, From the start and end of its pipes. I don’t know what could cause the problem. I’m replacing it every time.

[@alnakba]

I read somewhere on the box when i replaced mine that they last 60k miles on average. Or maybe that was their warranty? But not an expensive part for 60k imo

[@cindylopez2032]

My volvo has so much white smoke from exhaust and engine light and coolant in the oil. We believe it’s a Pcv is the issue. Is it possible that this bad pcv could cause the head gasket to also be damaged? There is so much white smoke the moment you turn it on and won’t stop . It’s only 2019

[@alansolomon2863]

I have a 2011 328i xdrive sedan. Is pcv valve under valve cover, as opposed to older models located under intake manifold? Lots of Utube vids on this topic are about engine type, not year and model, thus very confusing. Thanks

[@MechanicBase]

Yes, it's integrated into the valve cover. Older models (such as E46 320i with M54 engine) have an external PCV valve.

[@alansolomon2863]

@MechanicBase Thank you so very much.. Have a wonderful day. 1 💚

[@lisarussell5959]

Where is the PCV Breather location on a 2013 GMC Terrain Denali, is it connected on the back of the intake manifold?

[@MechanicBase]

Yes, it should be.

[@richardmorse5307]

I have a 1998 Honda Accord V6 with automatic transmission and 328,000 Km. For about 5 years there has been a thump or thud when starting it when cold. As it warms up the thump or thud gradually decreases to the point at normal operating temperature it’s quite mild. I have had the plugs replaced, the EGR valve cleaned, the valves adjusted, the MAF sensor replaced, the throttle body cleaned and oil and filter changes done regularly. Nothing has helped. I would be grateful if you could advise. Thank You!

[@lylipop]

I have a 2017 Mitsubishi Lancer ES 2.0L with rough idle, sometimes will blow smoke upon stepping on the gas pedal, will stall at red lights, leaks oil from an unknown source, and has a check engine light. Fuel economy seems to be unaffected until the symptoms appear as they are intermittent. The car will go into limp mode as well. I have replaced: downstream o2 sensor, valve cover gasket, air filter, oil changes, etc. Does this sound like it could be a PCV valve and do you know where it would be on my car? Thank you for any help provided, and I loved how you included the mechanics behind the PCV valve as well!

[@MechanicBase]

Do you have an OBD2 scan tool, to check what codes you have? But that might be caused by a stuck-open PCV valve.

[@justinhoernschemeyer8724]

Be aware there is a small bb in one of those vacuum hoses on top of the motor. Dont just rip those out and replace. Find the bb in the hose.

[@ncfym1]

Hi thanks for posting this video. I have e36 318ti compact m44, 210000km. recently it started giving headaches: engine will stop, especially short distance driving, usually an explosion in exhaust follows. Found out crankshaft breather hose that was cracked, changed it but problem seems to repeat. could it be a faulty PCV valve ??? I know nothing about how engine works

[@MechanicBase]

Hi. Does thi happen only on idle?

[@ncfym1]

@@MechanicBase Hi, no, only while driving

[@ncfym1]

@@MechanicBase hi, no only while driving

[@milkomilev4302]

Hallo verry helpful video .i loking for Mercedes Vito 114 2016 w447

[@MM-oc2pg]

Very helpful.Thank you!

[@wwiiinplastic4712]

I recently discovered the valve on the Toyota Camry with the 2AR engine is not exactly in a user-friendly spot. It can be done unless your power steering unit is in the way, which makes the job more complicated. SPOILER: You have to jack the car up and reach blindly up and feel around to find the valve's location; it's one of those deals.

[@MutsopotsiR.D.]

Can you help me locate the PCV valve for Toyota Vitz

[@soonerstonyful]

Thank you for your information.Can a bad pvc valve cause your car to run a little hotter

[@soonerstonyful]

Sorry pcv valve

[@majed9r]

in the diagram you show the PCV Valve installed in the head of the engine which is not correct, it is install in the Cylinder Block as its name indicates , Positive Crankcase Ventilation,

[@bigbadboogie6842]

Civic type R FN2 PCV about 40$ + aluminium washer 30 cents = dont skimp on the washer 😅 located close to the alternator and pretty easy to swap. Hose clamp is the hardest part to reach.

[@jonathanberndt]

My PCV and Rocker Cover were replaced in my 2023 Hyundai Tucson with 4K miles on it today. It has failed 4 pressure/consumption tests and is consuming 3qts of oil per 700 miles. Does this sound like a viable solution or should I demand a new engine since it's a lease?

[@MechanicBase]

That's way too much. Talk to your dealer, and if that doesn't help, contact the manufacturer directly.

[@lucidfairytales]

Hello Can you please tell me how to find my pcv valve on a 2013 Ford focus 1.6 l engine?

[@stuartwinstanley4949]

So what is the advantage of fitting a catch can as this isnt a controlled circulation

[@reefazrahman6093]

I have a Elantra 2018 GT (Base). Is it easy access to change the PCV valve? I get a rough sound when starting the car and saw some oil over the engine gasket beside the spark plug area.

[@notbuyhouse]

could you tell where the PCV in 2006 Hyundai Elantra? thanks!

[@selespeed3]

i have a BMW e36 m42 engine. The design of pcv valve is such that I don't see any outlet going back to the crankcase? there is an outlet going into the intake. Where is the other outlet? I am puzzled. MY idle is high. I can't solve this. Also, when i restart engine after using it for say half hour, the engine tends to idle very low. I suspect it might be the PCV valve. All other sensors have been replaced.

[@MechanicBase]

It's itegrated into the camcover. BTW, that's a cable-throttle engine, right? If so, the IAC valve could be the issue.

[@selespeed3]

@@MechanicBase explain to me how it is "integrated" into thte cam cover. the cam cover is just - a cover like in any lesser SOHC engine. and a mix of oil and air/fule vopor that escapes from crankcase is here that goes into the PCV. I have changed the tube or hose leading to PCV and it is gummy and sticky. The tube becomes soft and sludge is found inside. Once this mixture arrives in the PCV, it is then separated where only air goesinto the intake manifold. This means the PCV collected all the sludge or oil deposits, isnt it? And that it has to be replaced at fixed interval? like every year? The IAC is perfect. It is not an issue at all. I replaced it with anohte good used one and it is still acting this way. Therefore, this is ruled out.

[@powerRods]

Thanks bro 😊

[@JCGible]

Can a presure build up cause the plug wires to pop off?

[@MechanicBase]

That's not likely.

[@احمدفرج-ث7د]

My jeep srt consume a lot of oil with no smoke. I only smell gas when starting the car. Do you think a bad pcv valve could cause the oil consumption?

[@indielol8914]

Thanks to the video and WoW auction house bell nostalgia 😂

[@goose9238]

Ok I have a question. 2002 bmw 325i is my car. I installed the aluminum m54 valve cover originally leaving in the pvc system it came with, even thought this newer valve cover has a pcv valve on top. Later I removed the original pcv statem, the intake manifold hose plugged into the valve cover, so it's ocv system is working, or should be and have been driving the car for around 3 years. Long story short, yesterday I realized oil was being forced out from the valve cover gasket and removing the oil cap revealed a lot of pressure... Remember it's been almost 3 years and everything has been good. So I decided to reinstall the original pcv system and did so... the plastic hoses were a little broken so I clamped rubber hoses to them. The valve was new and unused. We drove the car for 30 minutes, lots of white smoke, parked and sat for an hour and then drove home... billows of white smoke all the way home. I investigated. No engine codes, also nolonger any oil. All oil was forced into the intake manifold, throttle body, etc and burned through the engine exiting through the tail pipe. Question is, what happened? Bmw's pcv system can only be connected in a specific way, so hoses aren't connect incorrectly. Could my pieced together rubber hoses be leaking causing vacuum leaks, causing oil to be sucked up? The oil separator valve was new, but could it have been blocked or defective? Or is it something tgat I'm missing? Thanks! Goose

[@MechanicBase]

@goose9238 Hi. So, what I can assume - tha aluminum M54 cover has an intergrated PCV valve, and over time, this clogged up, creating pressure buildup inside the engine. So, you fitted the OEM PCV setup to it - with external PCV valve, and three hoses. But because the PCV valve inside the valve cover is still clogged, the pressure forces oil through the bottom hose (the one connecting the external PCV valve to the oil pan) and into the intake, from where it gets burned inside the engine. Does this make sense?

[@goose9238]

Yes! My errors were it's actually an m56 aluminum valve cover installed on an m54 engine. Also I added the pilot mod which runs a hose from the pcv valve (bmw actually calls it ccv system) to the back port on the intake manifold which increases the vacuum in the system. The pcv valve in the m56 valve cover actually is not plugged, I confirmed. The big change I made today is I added a one way check valve in the hose to the dipstick tube preventing oil from coming up the tube. The car is drivable again. I still don't know why pressure built up in engine blowing oil out the valve cover gasket, this may have also helped draw oil up the dipstick tube. Before installing this valve cover with original ccv system and pilot mod hose this car ran fine, so something to do with valve covet... but not sure. I will confirm pressure is greatly reduced in a few days. Thanks for replying!

[@goose9238]

Pilot mod helps reduce oil consumption! Maybe you already knew this.

[@Anthony-i4p3z]

Where do I find the pcv valve in my bmw e3o 1984 model?

[@MechanicBase]

I think engines in E30 don't have a PCV valve. Instead, there's a rubber hose connecting the valve cover and intake manifold. That's how most older cars have it👍

[@KennethAnsere-sarpong]

Hyundai santa fe 2.2 2015 CDRI engine, I can find PCV valve. Please can you should where it's

[@MechanicBase]

If it's a 155 PS, the PCV valve should be on the rocker cover, on the side facing the turbocharger. You'll need to remove the plastic engine cover to see it.

[@HaroldRivera]

Were is locade the pcv valve on audi a4 2009 3.2?

[@MechanicBase]

Hi. Is that a TFSI engine? If so, you're going to hate the answer - it's burried inside the V - you need to take off most of the intake to get to it.

[@sannyskysr]

Where is the pc valve of a 2003 mercedes benz c240 located?

[@alanarmstrong9571]

Where is the pcv valve located on the 2013 hyundai genesis 3.8 sedan.? Please.!

[@davidbillyard6629]

I think that the pcv is blocked on my Fabia vrs because when the engine is running, air is blowing from the air filter housing.

[@richardg.7165]

Where is located de PCV in a ford fusion 2010 2.5L. hybrid. Thank You.

[@driinc3302]

wherte is pcv located valve located for 2015 Mercedes CLA45 AMG ? Right side of intake manifold or near tyhe catch pan toward the axle?

[@robertmceuen3630]

The PCV valve in my 2014 Honda Accord(2.4 4 cyl.) is just a plastic piece with no "one way" valve in it. You can blow straight through it from either way. How does this thing do its job?

[@kennymac2921]

It wouldn’t run very well at all if there is no valve mechanism. I’d assume that someone has previously blocked off the hose where it connects at the inlet manifold. They have either run a secondary hose elsewhere to relieve crank case pressure or the hose is venting into the atmosphere somewhere. Do you tend to have oil leaks going on? When crank case pressure build and isn’t running out of a PCV valve that can open then it’s the engine seals being put under pressure creating leaks.

[@shanonmcnutt644]

OK so 2017 jeep renegade latitude overheated and lost all oil to register we pulled over in less that a qrt mile and shut it off and now it won't Stat it will turnover and you can hear it fire but will not start any way not even for a second any insight is welcome

[@gavonialagrange9950]

Can you please tell me where the 2016 Opel Mokka 1.4 turbo, mine does the same, releasing white/grey smoke. Thank you

[@Zeek800]

That’s the PCV valve and is very common on the GM ( Opel included ) 1.4 litre turbo engine. The PCV system fails on these vehicles because of a small “ rubber??? “ valve in the intake. There is a company that makes a kit that bypasses that weak link “ valve” in the intake and you end up with a check valve in one of the hoses that can be serviced in under 10 minutes if it’s needed. Repair shops and Dealerships replace the plastic intake manifold and the plastic valve cover but that only “ fixes things “ for a short time and the problem will reoccur again. Like this guy said “ it’s not cheap “. The valve cover is around $150 Canadian dollars and the plastic intake manifold is three or four times that. Along with several hours of labour at $130-$170 an hour you’re looking for a big Bill. If you search Dre Dan on KZbin and you should find the info to check out the kits.

[@kaylajacob30]

Can a mass air flow sensor code mean I may need to replace the PCV valve? I replaced the mass air flow sensor but I’m still getting the same code.

[@_RiseAgainst]

Try cleaning throttle body and pcv valve with throttle body cleaner. Look for cracked plastic intake parts while you are cleaning those. Take back the MAF if possible and replace the OEM part. MAF codes are notoriously unreliable.

[@MashfikShamir]

Where is the PCV valve on a 2020 Acura TLX 2.4 Base model?

[@mercamg9312]

Hello. My Mercedesc32 AMG has a rough idle. l cant find the PCV valve. any ideas. Thanks

[@rickylee2477]

Junk

[@dd___dc]

My car boggs a lot and I recently noticed a lot of oil leaks around the engine seal and even the engine oil filter started leaking oil I am not if this maybe the issue

[@04swiftstang]

Most likely valve cover seal is bad....if the plugs are fouling up with oil...it will cause misfires in cylinders...hopefullly this helps.

[@amandeepsingh7417]

I have honda jazz 2015 indian model i have problem with Some blow by through the dipstick is pcv problem or anything. How can i find pcv location

[@MechanicBase]

Which engine does your car have?

[@kashiflf]

Nissan sunny 2006 automatic gear jerks while shifting 2nd gear?

[@fava7753]

Where is the pcv valve located on Mazda 6 . 2.0 diesel 2008 . .

[@Stainless316L]

Should pcv valve be closed ie not venting at idle ?

[@nandiuaroro]

Hi. I need help locating a pvc valve in a hyundai h100 2007 engine

[@bettywilliams2260]

Good Morning I have a 2006 Chevrolet Malibu Lt V6 3.5L 4dr Sedan, could you please tell me where my PCV Valve is located at

[@MechanicBase]

Hello. It should be at the cylinder head facing the radiator, near the dipstick.

[@alexpuente123]

You said oil leaks every where .. if you replace the PCV would that solve the oil leaks ? Or you need to replace more stuff

[@MechanicBase]

A blocked PCV will cause excessive crankcase pressure, which then causes various oil leaks (for instance - camcover gasket, crankshaft seal rings and so on).

[@JB-423]

Would think replacing the pcv would help but you'd still have to replace whatever gasket blew out

[@brandypresley1869]

It blew my rear main seal

[@pamelaherman7863]

Can you please help me on a 2008 Chrysler Aspen 5.7 hemi.

[@androbacic2161]

Can you please show me where a PCV valve is located on citroen 1.2 puretech turbo petrol engine? Thanks in advance

[@josephratowski8223]

what is a citrogen some kind of virus

[@jessejohnson7565]

2006 honda civic,poor acceleration, struggles to go over hill and the fuel trim is all over the place,only code i hav is p0420 because i knock out the catalytic converter,can a pcv valve cause the loss of power and irratic fuel trim

[@MechanicBase]

How does it work on idle?

[@jessejohnson7565]

@@MechanicBase normal idle

[@jessejohnson7565]

Sometimes the short term fuel trim is within the -10 sometimes it goes over