**READ DESCRIPTION** How the B58 PCV Works

UPDATED VIDEO: • Let's talk about the B...
Breakdown of how the B58 PCV works and how you can improve it
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[@kern417]

Good news - it seems they are starting to sell the diaphragm separately in case it needs to be replaced. Search for "Membrane Valve Cover Diaphragm For BMW B58 11127645173 repair kit" on ebay or similar sites.

[@daddad4589]

How do you know when this membrane needs to be replaced and is the diaphragm housing easy to get off?

[@kern417]

When the pcv fails you'll need to pull it and check. It's not too hard to replace, just be careful removing the cap

[@daddad4589]

​@@kern417 is there any condition in this PCV circuit which could fail and cause crankcase over-pressure?

[@kern417]

Theoretically if the diaphragm doesn't move when it should

[@daddad4589]

@@kern417 So would this be the best solution: delete the pcv diaphragm & vent to air then also add a closed-system oil catch can like the BMS between the crankcase ventilation nozzle and the intake pipe?

[@armandodeleon7363]

Thank you for all the info, I learn something new with every video.

[@Deighvid.]

wow, great video! I'm just learning about all of this stuff so this was super informative and easy to understand. Thanks!

[@josephdarco8677]

Was going to request this video. Thank you!

[@pedroquintana2940]

Bro just seeing this I just learned so much from this video I appreciate the context and explanations and pictures 🤙🏼

[@len8140]

This is very informative as usual as opposed to people screaming “blown turbo” Had this happen to me this weekend. Car idled for probably 1hr and it was 60 something degrees , didn’t notice till i saw a cloud of smoke in the mirror and heard a whistling. Saw some “$3000 fixes” till I did some research and this video definitely confirms it.

[@sharklos]

Did you have any oil leaking? This also happened with my m240.

[@unirapide7726]

Very informative video again, thanks man!!

[@dan_kaz8272]

This video literally saved me today. Thanks brotha!! 🙌🏼🙌🏼🙏🏼🙏🏼

[@FrederickvanStadenSA]

I had my turbo refurbished because the guys thought it was the issue. Turns out it was the PCV! Thanks for explaining

[@xxtagerxx8165]

Dude I fkn love you, always on a roll with the knowledge, much appreciated

[@cortlandlaidlaw3888]

Best vid out there on the b58 valve cover

[@christopherledesma4504]

Great video! My third watch of the day .

[@tonymallia1940]

Another great video

[@supremegt]

Great info 👌🏽

[@nisamisa8869]

Love your videos !

[@giovanniguevara73]

Just ordered mine !

[@anthonyh958]

Nice job

[@1MLE1]

Hey before you get a lot of subscribers I just wanna leave the comment because your explain is something feel like clean! Idk how to explain the feeling tho lol.

[@kern417]

Lol i think i understand and thanks

[@kwon-tobi]

비디오 감사합니다. 덕분에 한가지 배웠네요. 😄👍

[@HassanEido1]

After I got a built engine. I started getting smoke on startups if the car sits from more than 5 mins then smoke clears. No smoke on acceleration on idling. It was the pcv basically the 32 psi with the bigger ring gap and extra tolerance built into the forged pistons overwhelmed the pcv system. All we could do was install the pcv delete and it worked like a charm.

[@peterkukolik8402]

Thank you.

[@valleybmwswedrive5283]

THANK YOU!!!!!!

[@kingropplebopplesoppy2634]

Just replaced a PCV Diagphram on my Sons VW 2.0 TSI (similar solution to the issue). His rubber diaphragm was cracked as shown in your video and the car would drop in idle and stumble around ... no smoke at all however. I don't think the OCC along with the PCV is really a complicating problem. One that works well will collect a fair amount of oil that doesn't need to be deposited all over the internals of the intake manifold and valves over time. It is another maintenance item however and if you forget to drain and it fills to the top it can suck in excess oil!

[@kern417]

Also, if you live somewhere where it's cold, water can freeze in the catch can lines and cause it to burst

[@itzahstickup]

This happens to me when i idle for too long, i might look in to that kit

[@bimmerbahaa1425]

same i just got my 340 and it smokes on idle i ordered the diaphragm. did that fix it?

[@itzahstickup]

@@bimmerbahaa1425 yes it did bro !

[@bimmerbahaa1425]

@@itzahstickup 11 months later what a goat thanks man i’m literally just waiting for the amazon truck to get here to put it in.

[@itzahstickup]

@@bimmerbahaa1425 🙏🏾 anytime man ! Lmk how it is after.

[@richm8482]

Hey kern thank you for the imformative video, so I had a question, what would you recommend, the Vader solutions kit that deletes the diaphragm or something like the Vargas turbo oil cap breather with the check valve?? The Vargas turbo seems like the cheaper solution at 100$ over 300$ for the Vader kit, but which one is actually better? Thank you

[@kern417]

The vader kit is better. I would not recommend the vargas breather without the vader kit, and vader solutions sells their own breather as well. So really you can get it all from VS. However, it's not needed for most people. Unless you suspect there's an issue with your pcv, save your money.

[@jasonsutton6193]

Bro your videos are awesome. Your knowledge on b58 engines is impressive. I’m sure you get bombarded with questions but if you could help it would be greatly appreciated. I just installed a turbo inlet pipe on my 22’ m340i and everything went well except getting the pcv line off the OE inlet. I ended up accidentally break the squeeze tab on one side and was able to get it off but now my concern is it will stay on the inlet pipe I installed. Was wondering if you had a fix for this, do I need an entire new line? Does bmw or anyone sell just the connectors? Thanks man. Really enjoy your videos. Your 440i is insane.

[@kern417]

If it's not staying on then you'll most likely need to buy a new line, but a lot of people aren't having issues with it even if it's broken

[@jasonsutton4451]

@@kern417 I actually got it, thank you. Just put a little oil on the inside of the nipple on the inlet pipe and i was able to get in to snap in all the way. Appreciate the help.

[@nickdubya9924]

I have a catch can, stock oil cap and stock PCV diaphram and i’m getting pretty decent blowby out of my catch can still. Will send you picture on IG. So you think i need VS kit? Probably avoid oil cap breather? Trying to save the environment best i can while still havin my fun

[@chancemcmaken2353]

2020 m340, pure800 turbo. Car doesn’t build boost correctly after a few runs sometimes , can’t seem to figure out the issue. Not sure if it’s wastegate , injectors, crankhub. It is throwing a crankhub code but my mechanic at bmw and my local shop says it shouldn’t affect my performance ( a sensor was removed/replaced when turbo was installed .

[@freddyrojero181]

I was in a bumper to bumper traffic and it began to smoke from the exhaust, then I turned it off and on still kinda happened till I drove off it went away completely should I still consider the vadar solutions kit ?.

[@kern417]

It will prevent that from happening again

[@christhompson5929]

Anyone know of a DIY video for catch can install on G05 B58? Just purchased a Turner Performance Baffled Oil Catch Can & Oil Drain System and want to make sure I get it right!

[@mr.m2137]

@kern417 I just got the crankcase ventilation leakage code 16050A. Does the Supra B58 have the PCV somewhere else? Cant see it next to the oil cap.

[@kern417]

It's built into the valve cover

[@iliketakingshowers]

Kern I have a Gen 2, when i pop the hood, it smells like oil. I dont see any leaks, im thinking it could be the fact that i have 40k miles without a catch can. I'm going to install one but I want to know is there a detailed process on how I can clean all of the oil thats gotten everywhere?

[@NikkoCruz1]

I have a catch can now but just ordered the ross racing pcv VTA kit. Is this overkill or will it harm the engine at all?

[@kern417]

vta kit works great

[@dazedamaj4504]

I’m late to the party but if you’re still around too reply, how do u feel about the Ross racing pcv delete with the oil catch can? Would that be a perfectly fine solution for my stage 2+ b58 or is a catch can doing too much and better off with only the pcv delete they have? Just stuck between getting rid of the pcv problem or replacing the oem pcv every so often. Thanks

[@kern417]

Ross racing works great. Pcv replacement is obviously cheaper but a delete makes it more bulletproof. kzbin.info/www/bejne/rGWog5yjn6-iiLs

[@vividmotion66]

How is that on the B48 engine. I only have the pcv value exit like the B58. I dont have an pcv diaphragm. I think it is build directly in the value cover. How can I check if it is broken?

[@miring822]

B58 leader please help once again my man, I saw a forum post that you replied too of a guy that had the PVC problem and replaced the whole valve cover since it’s built in. I saw that he had the same symptoms I had which was after 20-30 mins it will suddenly rough idle & the tea kettle whistling noise. Do you think if I just replace the PVC diaphragm and seal it would it fix it or do you have to replace the whole valve cover? The only thing that is making me think to replace the whole valve cover is that the people with PVC issues that would just replace the diaphragm had ether the kettle noise or white smoke but NO rough idle shaking? .. would the PVC diaphragm failing cause only the kettle whistle & NOT the rough idle shaking or would that shaking be due to the valve cover? TL;DR Rough idle shaking and tea kettle whistle after 20-30 mins of parked idle. Replace whole valve cover (fixes the rough idle shaking & kettle whistle after 30 min idle) OR replace PVC diaphragm (fixes the kettle whistle after 30 mins but possibly will not fix the shaking rough idle)

[@kern417]

Replacing the diaphragm should fix it

[@brakthru2]

I noticed oil blowby had vented past the oil cap leaving oil residue around the cap after a spirited drive the other day running high boost. Is this normal or an indication i need a new pcv. Im not having any smoke or other issues. The shop did note they think a little oil pushed out of the oil feed line and they are fixing. A smoke test was done and no leaks. Thanks for this video.

[@kern417]

Or maybe you just need a new cap if it has a poor seal

[@brakthru2]

@@kern417 ok. I plan on getting a new cap as the dealer said the oily rubber seal may be causing a poor seal. Thanks!

[@solerzyoutube]

@kern417 I have black smoke coming from my exhaust and misfires at idle, specificly cold start. I inspected my PCV diaphram and it look fine, no damage. My car is throwing the P0171 bank 1 too lean, any idea of what it could be?

[@kern417]

Sounds like an injector issue. Pull your plugs and see if any of them are wet or white

[@solerzyoutube]

@@kern417 thanks for responding. I thought it was an injector issue but after taking my car to the dealer, they reflashed my ECU and the car ran perfectly for 3 days then went back to what I previously received. So I don't think it's mechanical, most likely electrical. Any idea on what it could be? Desperate for help as me or the dealer can't find out what it is

[@kern417]

@@solerzyoutube it could be a lot of things. They'll need to diagnose it

[@technopro-kz4xv]

@@solerzyoutube hey! Have you solved the issue with the P0171?

[@solerzyoutube]

@@technopro-kz4xv hello, no I actually just cleared the codes and got rid of the car. Didn’t want to keep throwing parts and money at it so I never found out what it was

[@trnql_noir]

Would running the Vader Solutions vent with a Oil Cap Filter at the same time be beneficial? In my head I imagine that way there will be 2 ways for oil vapors to escape the crankcase (Through the vent to atmosphere PCV mod (Vader Solution) and also through the oil cap). Correct me if I am wrong please. Thank you!

[@kern417]

The main thing is to do the delete. Everything after is just a cherry on top

[@trnql_noir]

@@kern417 Sounds good! I am just curious if my logic is sound or if I will be causing some issues I do not know about. Could you let me know? Thanks

[@kern417]

@@trnql_noir the delete is all you really need

[@matthewdasilva5871]

Could you have both the oil catch can and the VS cap? Also on his website it isn’t very helpful but are you buying just the cap and the AN LINES?

[@kern417]

Ideally you want the VS breather to vent to a catch can but it needs to be purchased separately

[@matthewdasilva5871]

kern417 i have a burger tuning catch can i wonder how it would work as i’ve seen no diy’s on it.

[@kern417]

@@matthewdasilva5871 the issue is that the vader solutions kit has 2 feeds. So you'd need a catch can with 2 "in" ports. But you can still leave one of the connections vented to atmosphere.

[@matthewdasilva5871]

kern417 gotchu seems a tad bit expensive at 300 to pair it to an aftermarket catch can but the idea is there! Thanks for the feedback and amazing vid as always !

[@stevenfgv1280]

Hi there, I recently had a pcv diaphragm fail on me causing it smoke. I got it fixed but the guy that changed it removed the entire valve cover saying it was integrated with the pcv. I know removing it you have to remove the ignition coils and HPFP, and fuel injectors. it ran for 2 days then I got a misfire in my 6th cylinder. I changes The coil and spark plug and no misfire but then the turbo wasn’t spooling loud how it’s supposed to. went to a shop to get the check engine light turned off so I thought maybe that was the issue for the turbo not spooling how it should but then it misfired again in the 6th cylinder. Do you think the fuel injector is the problem for the misfit and the turbo not function as it should? Would like a response back thanks!

[@kern417]

if it has been having issues since a shop worked on it then bring it back to the shop to get it fixed.

[@earlshelton79]

Does the b58 have an egr valve? I would like to check mine if so, it's mentioned that they get dirty after a while. If so where is it so I can clean it? I wish we where neighbors😆. You're very Knowledgeable and people like me need you lol.

[@kern417]

no

[@Domas64]

PCV works only on light load. It blocks ventilation under boost where intake would pressurize crank case or under idle where vacuum is too great and would pull too much vapor. Idling puts stress on pcv valve/diaphragm as it has to hold all that vacuum. Over long time it probably gets overwhelmed, allowing idle vaccum to suck vapor into combustion instead of just venting. That causes poor running and smoking. Giving it a good rev once in a while while idling should give a chance for pcv valve to recover. Issue is probably happening with older PCVs, replacing them more often would prob reduce the issue somewhat. But still it's a design flaw. Car should idle for a month without an issue

[@harbl2479]

Stop perpetuating this silly myth about idling in some way being the cause of this issue. The only reason people think that is because a damaged pcv is most likely to be noticed at idle. I recently had my pcv fail and I inspected the pcv valve's operation during engine running when I did the repair. You can look at the valve operating with the cap removed and you can depress it with your finger. The spring and plastic piece (for anyone who doesn't understand what I mean, look at kern417's pcv replacement video for clarification) take up the forces involved and the rubber diaphragm's sole job is to provide an airtight seal and is not "stressed" or "stretched" in any way during idling. The reason it ruptures is due to poor material quality and age. When that happens, excessive vacuum will build up in the crankcase because the valve can no longer work. So please everyone, idle your b58 equipped car without any worries and make sure to replace the diaphragm as regular maintenance every 2-3 years :) It's a cheap part and takes 5 minutes to do.

[@Domas64]

@@harbl2479 I was just brainstorming. I'm not aware of how it works exactly on b58, but on other cars PCV valve is holding the boost or vacuum of the engine so it is under stress. Maybe it's not much stress on b58 as you say, but probably enough to rupture and old diaphragm. So I agree on being on top of it and changing it before it fails.

[@harbl2479]

@@Domas64 It's good that you are brainstorming. But you don't understand the system. It is a valve with a spring that simply regulates pressure inside the engine and keeps the crankcase in a slight vacuum as intended by the manufacturer. If there is too much vacuum, it will close the vacuum feed and if there is not enough, it will allow more gasses to escape thus keeping the optimal level, which is determined by the spring. It never sees excessive vacuum or any boost at all. Once it ruptures from old age, it will no longer control the pressure (because the spring will never compress enough to seal the vacuum feed) which will result in excessive negative pressure in the crankcase.

[@harbl2479]

Your mental model of it "holding back" boost or vacuum is wrong. Also the deflection from fully open to fully closed of the diaphragm is minimal (a few milimeters) and does not stretch the rubber. All of this can be verified by anyone by opening the pcv cap while the engine is running in the hopes of finally putting this myth to rest.

[@christianmedina9908]

21A02D is that code related to the valve cover problems?? I can’t find anything

[@kern417]

It's most likely related to vanos

[@kern417]

Not sure what happened to your comment but unfortunately the only other thing I've seen fix it is a software update from the dealer.

[@brakthru2]

Hey, The Ross racing catch can kit won't work with my car because my large air intake box prevents the AN line fittings from connecting the CC and valve cover near intake. I'm wondering would just running the Ross racing PCV replacement cap VTA and leaving the vent port stock on VC near turbo be of benefit? Will this setup be safe and vent enough pressure to reduce blowby?

[@kern417]

I believe it should work fine

[@brakthru2]

@kern417 is the PCV cap the low side or high side. I obviously don't know much about this stuff. Lol! Thanks!

[@kern417]

@@brakthru2 cap is low side

[@brakthru2]

@kern417 is this the side for when I'm in boost or accelerating or the most important side I should be concerned about? Thanks man!

[@brakthru2]

​@kern417 what I'm trying to find out is if the PCV cap vta will help any when full throttle or help the high side have less blowby as well? I assume reducing any crankcase pressure will help the overall system? Also, would adding a oil cap filter help both high and low sides? Thanks

[@zacharyschneider5113]

Does the VS PCV Delete come with a new diaphragm under the billet cap?

[@kern417]

No it gets rid of it

[@zacharyschneider5113]

@@kern417 And this completely fixes the smoking PCV issue? My car occasionally smokes when i suffer the issues mentioned above.

[@kern417]

Yes it should. At that point there's nothing left to break, it that makes sense.

[@jerrex2762]

So does this create blue and gray smoke ?

[@kern417]

It definitely can

[@danked6731]

I just have white smoke not thick on idle cold and warm and at normal temps which is scaring me

[@christopherlerma3903]

What’s up man, I was driving my car home from work and like at random times, white smoke would come out of the exhaust while driving and I have no clue what it could be. Some times there would be a lot of white smoke coming out. Do you know what it could possibly be?

[@christopherlerma3903]

I have a 2020 m340i on a custom e50 tune with a dp, charge pipe, and aftermarket intake.

[@kern417]

it could be a lot of things. you'll have to go through the car to diagnose. scan for codes, etc.

[@christopherlerma3903]

@@kern417 thanks for the reply man! I took it to my tuner (PQ performance) and they said it was the pvc system but they couldn’t determine what part needs to be replaced of the pvc system. They told me to wait longer.

[@christopherlerma3903]

Pcv*

[@christopherlerma3903]

@@kern417 what would you recommend me to do?

[@xcashinx7370]

What you recommend port injection or methanol injection

[@unignostik]

making power port is always the answer. Never use meth for fueling, only cooling.

[@kern417]

Port Injection or both

[@xcashinx7370]

@@kern417 I don’t look at making crazy power plan on getting a pure800 running 93oct with snow performance wmi kit or you think port injection better instead?

[@kern417]

@@xcashinx7370 you can do port fuel injection or port meth Injection. Port fuel injection isn't needed with the pure800, but you won't make 600 on 93 octane. You'll need meth, whether it's injected in the charge pipe or port Injection. Port is more ideal but port meth Injection is hard to setup.

[@mohamedbohemdi3900]

What about adding a breather to the PCV port and blocking the turbo inlet PCV connection? I did that to my 2020 Supra running a Pure800.. Followed what most top frame turbo upgrade kits did..

[@kern417]

The Vader kit does that in a sense. It adds a dump tube to the pcv port so you don't need to route it back to the intake. Sorry I missed that in the video.

[@MrDrivingFaster]

That’s what I ve done to my E36 M3 and the intake side internals were like shiny and new after 100k miles

[@filsm140]

@kern417 thank you so much for this video. Maybe you can give some insight. I have a creaking noise coming from the "membrane" or whatever is inside the ventilation 2-3 seconds after I turn off my engine. As heard here kzbin.infoZMgZ7TqSPjs?feature=share car has no codes and runs fine. I was told I would need to replace the whole cover to get rid of the noise. I'm wondering is this really a worry right now? I've taken out the hose and have minimal oil residue, I would say "normal". So I'm not sure if there is an easy fix. Thanks!

[@SSWORKZ]

Why not just change the diaphragm? What's the reason why this isn't the first solution?

[@kern417]

Because it doesn't make sense to have a catch can and a pcv. It adds more complexity and potential failure modes when it's not needed.

[@SSWORKZ]

@@kern417 didn't ask about catch cans lol. Can you just change the rubber diaphragm and move on?

[@kern417]

@@SSWORKZ sorry i got mixed up with someone else's question. But yes in theory you could, i think i mentioned it in the video as a potential fix.

[@SSWORKZ]

@@kern417 that all good. Thanks for the info.

[@ProcTech]

So if we suspect a pcv failure, 1st check should be the diaphragm right? Hopefully it's a cheap and easy replacement.

[@adsali03]

Would the pcv system cause the car to make electronic beep sounds?

[@kern417]

Nope

[@adsali03]

@@kern417 I have a video of my car making the beep noise and I have been told it's the pcv system but wanted confirmation

[@adsali03]

Here's the video kzbin.info/www/bejne/h6jUZn5_dqeshKs

[@kern417]

@@adsali03 I don't hear anything out of the ordinary

[@adsali03]

@@kern417 it's definitely making a beeping noise every few seconds in the video..