I could kiss you right now. I have been trying to find the source of this nosie for MONTHS with no luck. Changed out SO MUCH STUFF costing thousands but this, this is perfect. I literally jumped from my desk when I heard the EXACT sound. Thank you thank you thank you!

I bought the whole assembly brand new. The dealership said I needed it. Definitely learned something new today from this video.

My wife watched your video and told me she knew how to fix the problem. i looked at her a little crazy but sure enough this was the problem thank you so much man.

I had this exact same issue last year, thankfully I was under warranty took it to the dealer and it took 3 attempts to fix this issue. They replaced front and rear main seals then they decided on just replacing the entire valve cover. Finally I know what the real issue was, thanks a lot.

Absolutely amazing video, you solved my issue I took it dealership they wanted 1470 for replacing the valve cover gasket for my E90

That’s the same exact noise my N20 is making. I kept thinking it’s the belt or pulley. But thank goodness I kept searching for solution. 👍🏻

Very good explanation. By the way BMW (Mauritius) couldn't diagnose this noise problem even after 3 visits to its Repairs Department. What a shame for the sole BMW representative in the country. Again Thanks; you're much better than those dudes. S.Thomas.

Quick note here - It is a good fix however, do not seal the new cap in the groove with sealant. The cap is designed to suck air up around the diaphragm on the inside of the cap. If you place sealer in the small space of the cap - as shown - this blocks the air from being pulled into the diaphragm cavity. Place the sealant on the out side of the lip of the extrusion on the valve cover and then snug the new cap over that. Seal with some aluminum tape until the sealant dries or just leave it on. This way there is an air tight seal on the new cap but not on the interior of the new cap - this allows for the diaphragm to breath...NO squealing.

Thank you so much - this is exactly the problem I'm having with my 2014 335I. Local Dealership is asking $1,700 to replace the valve cover gasket. What a rip off. Thanks for posting such a thorough, informative video of the issue and possible resolution. You are super awesome.

2009 328i N52 engine and I've the same exact noise! Not sure I'll be able to do it on the spot and I believe I'll end up removing the whole cover(full day job). But thanks for posting this, it made my life so much easier.

Great video! Thank you! I hope you keep this N55 car for bit longer and create more amazing content!

I’m getting this sound now at all times. While driving. Will hopefully get it repaired soon!

I legit laughed because this is exactly my issue but I'm replacing the valve cover anyway. Great video.

Dude I have this issue with my 2013 335I; I took it to the local BMW dealership and they tell me they cannot replicate the issue. such a frustration - and what a bunch of moron that works the dealership, charges an arm and a leg and still can't find the issue. I thank you so much for this honest informative video. May God bless you for your help.

Saving the day again! Great content and reasoning on your repairs. I have an E90 N54 (very similar to yours) and an F30 N55 (2014 also) and need to do a valve cover for a diagnosed low pressure (vacuum?) fault along with a few other easier items at the same time. So, looking like a weekend of me cursing at the F30 for a valve cover replacement (gonna use FCPEuro's OEM part though for piece of mind). Hope I don't mess it up too bad! ;)

Good looking out my guy. That noise is driving me crazy

True to your word. Thanks for being the Guinea pig for us. I don't have this issue yet, but i have a 2013 X5 N55 motor.

I have this issue right now with my BMW m235i with a 2016 M2 engine conversion (still a N55 engine). I have the start stop coded to be off all the time so I never noticed it till I accidentally switched it on and it made that noise and I freaked out. Because of you I Now I know what it is. Thank you!

Yes, my 328i convertible 2013 has this happen the other day and the dealership wants just over $2,000 to repair it, about $639 for the part alone, and I found a shop that will do it with OEM for $1,083. Not sure if this fix is available for my motor. If it ever happens again I will look into it deeper. But thanks for sharing this anyway. Only BMW could turn a 20-30 dollar part into a $2,000 repair! Like the hall sensor that went out in August, a $25 part, but integrated into the hydraulic ram that raises and lowers the top, so the whole thing had to be replaced at more than $2,000 and towing of $485. My third BMW 328i and the first one with any repairs needed. Any more like this one and I will have to live in the damned thing.

It's more than just replacing the CCV with that top part only. The whole valve cover has vents and air tunnels that get clogged and if not replacing the whole Valve Cover problems will still continue like loud whistling and humming after just replacing the Valve cover gasket only as the whole valve cover with build in CCV should be replaced... Ebay $90 to $140 for complete Valve Cover unit which includes the valve gasket already on it...

Awesome video with excellent lighting. I hate whe people film at night with no adequate lighting. Great job!

Subscribed. I have a E70 N55. A friend of mine had one also without engine start/stop. After replaced the valve only it didn't the noise still happening so he had to replace the full valve cover.

I did mine PCV replacement immediately after I drove the car so everything was warm and it was very easy to make a small cut on the side and pull out whole PCV assembly without even tearing it in to pieces. Unfortunately, howling NOISE from the front main seal did NOT go-away. When I started my X5/N55 on idle for about 5 minutes, the noise returned back, while car was ruining and noise was present, I carefully loosen the oil cap and I felt very high vacuum built-up, which was relived by opening Oil Cap and the howling noise was disappeared. After putting back Oil Cap, noise started again. So it is clear that there are many pressure regulating valves/ air ducts in the Oil Cover and some of them may be damaged as well. Before removing faulty PCV, I connected a 1/8 clear rubber tube (30 cm ) and other end slighly dipped in to water cup and I see it sucked water immediately because orange diaphragm of the PCV was broken at many places and also became brittle , after replacing PCV, the water sucking was not observed that means new PCV is not leaking to atmosphere. Noise issue confirmed that there is other pressure regulating hidden valves are faulty and which can not be replaced so my next step is to replace the Valve Cover.

Your education is really excellent and it solves the problem, but my problem is beyond this and the reason is the place where I live and the country where I live, which has a law similar to the law of the jungle. My compatriots trample my fellow countrymen and cause my country to be embargoed, that's why cars and spare parts and all the things people need are very expensive or rare. He found a valve door in the parking lot and the ability to buy a valve door that costs 500 dollars in my country has disrupted my life and I am slowly getting depressed. 😭

You know what your doing for sure! New valve cover vs pcv better going with the valve cover with built in pcv and same future issues. Good job

This scared the shit out of me and i thoight it was the belt. God damn valve cover

Thank you so much for sharing.. this is exactly whats going on with my 2013 X6.. exactly what it is..

Very happy I found this, will be applying this to my e90 this weekend. Thanks a lot!

Replacing the oil cap as well helps. Apparently seals goes bad and leaks

This is temperary fix since the vents inside the CCV and valve cover also get clogged and messed up. Replace the whole valve cover brand new OEM on ebay for $90 - $130 high quality OE specs! I replaced mine and no more oil leaks, car starts and idles smooth cause no more vacuum pressure leaks from valve cover. Yes its worth every penny!

Fantastic video again! Thank you for your work.

wow big thanks for this, I also assumed I had to dremel the old one off from the side...this looks so much cleaner! Well done!

Supposedly when the valve goes bad the pressure builds up under the cover and that is the true cause that creates the infamous valve cover oil leaks.

now i see not just i work for bmw factory:S good video thank you i will buy new one i see

Can you give us an update? how is it working out AM valve cover for you?

Wow this video was perfect. Thank you.

I have the same exact sounding issue on my 2013 X5 3.5i. When I undo the oil cap with the engine running the sound goes away (and releases vacuum pressure at the same time). I recently went to 2 different independent shops, one of which I highly respect and have gone to for years and they had no clue. Now I know what needs to happen. Thanks for the great video!

Good deal on the Valve Cover! I bought my aftermarket URO Valve Cover from Autohausaz and spent almost $300...😐 Still ended up saving a ton of money doing the work myself though.

Thanks gang. Needed this for my f06

Thank you so much brother I have same issue with my BMW 328I Thinking a lot about that issue I bought a electric shift sensor For that issue 🙏🙏🙏🙏🙏

If you car is making that awful noise and you do not change it will ruin your turbo as the function of the device is to such air and block oil and send it back to the engine. When it is ruined it sucks everything into the Turbo, brilliant video btw.

Thank you so much I had this problem on a 2011 335i great job.

Just a tip for people replacing just the pcv valve, make sure you put only small amount of glue on the outside of the housing not on the cap, same spot as per the oem valve. Too much glue will cause the new diaphragm to stick to the new cap which will close the valve and not operate correctly. You will end up hearing the squealing sound again like in this video as the diaphragm can not move freely.

I’m sorry but if I’m not mistake then I believe this job should be a factory recall. It’s free replace. You should check with your local dealer.. thank you for make a such great video.

Fr thanks so much for this video!

How is the valve cover holding up today? What brand did you get?

There is no way around you need to change the valve cover

Did this and the noise got worse, next ill do the whole valve cover, but it doesnt work. Ill let you know if it fixes mine

Thanks a lot I just replace mine using your steps

Hey Nice Job, has the after market vale cover given you any issue up untill now or all is still good?

Dude, You're the Man!!

Also wanted to add onto my previous comment this is what they said "Found diaphragm for crankca()e vent on valve cover ruptured. Replacing valve cover. " And the issue that mainly came from mainly having my AC on.

Replace the Value cover and you save yourself from many headaches. The price is worth it

Thankkkk you I had the same problem with my 435 .

It is great video. I do have the same problem . And I'm 70% fixed the issue by deleting the crank ventilation valve so I only get this noise in hot start not even everytime but cold start no noise at all

Thank you this very helpful

So I had my Valve Cover replaced by a local mechanic and then it started making this noise a few months later. What does that mean?

I literally did replace the same PCV valve yesterday, 1/19/2020. I had the exact same ending: I need to replace th whole valve cover. Front engine seal started to whistle after I replaced the PCV valve I bought from Amazon. I ordered a Febi Bilstein valve cover for 254$ and I'll replace it this weekend. Hopefully that will cure my seal's whistling, 3rd cylinder missfires and CEL. 2011 BMW X5 E70 35i with 84.000 miles on it.

Can you do this with the valve cover still on or is it best to take it off

Would a vented oil cap solve this issue as well ?

This is exactly what's happening with mine. Whenever the car is about to auto-off it starts whining. If I'm quick enough to hit the off button it will stop before shutting off. It sometimes does it while driving down the road. I figured since I have a pretty bad valve cover leak this is going to solve 2 major issues. These cars will keep you busy! Next is the rack n' pinon :-| Then the flaking display film And rear door handles that are gunked up. The windshield cowl is starting to crack The sunroof fabric and now the headliner is starting to hang

❤️❤️ thank you for the help ❤️

Another great video. Tnx!!

Would this cause oil consumption?

Just beautiful. After a very long search the vid I was hoping to find. Excellent well engineered repair and commentary. thumbs up and Subscribed

do i have to put glue on it???

Thank u do much just did a valve cover and its making this exact noise iwas scared it was like a belt or something

What is the name of the piece

So you bought a whole new valve cover. Did it come with the gaskets and pcv? The link to ebay doesn't work. Or does everything need to be bought separately?

I have a rule that would've prevented you from having fix this and then finding out it isn't fixed. Think of it as assembly pages in a parts book. Next hire assembly. For instance, there's probably a page dedicated to just that pcv valve. The next hire assembly is the valve cover itself. Always, when you can and money isn't too bad, go to the next hire assembly and replace that. A lot of times the lower assembly part affects it's next hire assembly. But use your skills to determine also. This case, knowing there are multiple pcv valves, devices, etc. it would've been a no brainer to replace the valve cover, especially with almost 100,000 miles of heat treating on it.

yes im same the problem and i change up ccv & crankshaft oil seal the same come out !

This has also just happened on my 2013 N20/N26 4 cylinder, same thing!!

Currently have the same noise on the N52 motor.

Awesome video. What is the Start / Stop feature? I have a 2009 X5 3.0 and have the same issue. Dealer wants almost $2,000. But watching your video is helping a lot. I am thinking to do what you did first and if that does not get rid of the noice My mechanic will replace the cover. Any additional advice please. Thank You, your video is helping lots of ppl.

I replaced the round pcv valve on my 2011 328i N52 I was very careful to do it correctly as possible but it started to act up again in a few days. It ran ok but started to make noise and a lot of suction from the oil cap. I felt there was no other alternative to but to replace the entire valve cover. I have a BMW motorcycle which I love. but I will sell this car an never go to BMW cars again Too much trouble in other areas as well.

My E70 with N55 engine is also producing the same squealing noise and appreciate your video very much. But unfortunately the part number that you show in the video is referring to the whole cover not just the PCV. Where can I buy the PCV?

Thank you!! 👍🏻

Link for the valve cover doesn’t show the valve cover anymore, anyway u could show us another brand u recommend or an affordable valve cover? Please

Thanks for sharing the whole experience.......The N52 engine has the same round valve/diaphragm that you replaced in the beginning. I do not believe it has all the other integrated diaphragms that the N55 has. That Diaphragm fails on the N52 as well. So this is help to those who have an N52 engine.

I mean if we don’t care to use the auto stop feature, should we still replace it? Have this exact problem but I never really cared or liked the auto stop so I’m fine with just having it off to be honest. Or do I still need to change it?

Where’s the long please ?

If we turn off start/stop function and drives the car like that, would it be a problem? Do I have to have valve cover changed sooner or later? My car makes the noise as well and I usually don't let start/stop interfere if I drive in slow moving traffic by using the manual transmission but yeah, the noise is annoying.

Hey What about oil catch can? If I install this will this solve the problem?

I did this but It's squealing again after one week. What could've made it go bad again so fast?

THANK YOU!!!!!

Yo so I did this diy like 1 year ago seemed fine did the valve cover gasket yesterday after putting the car back together getting hella codes but they go away after clearing couple time but also the car is making the squealing sound on cold starts when opening the oil cap the sound goes away start after the car warms up it goes away too everything is put back together right this is my second time doing the valve cover gasket on a n55 do u think the pcv diaphragm went bad again maybe a crack in the valve cover I’m about to just order the valve cover cause idk what to do at this point ☠️

Good video. I was reading the flash point of motor oil is only 232 deg F. I wonder how safe it is to do the heat gun on the cap while still installed? anyone any thoughts?

My man👍💯

Hi there, I replaced a water pump for my f10 535i xDrive 2012 and did the bleeding and everything worked fine, few day later vehicle started overheating, I checked the water pump by activation method and didn't seem that it works! Diagnosed the system and got the code 20A909 ! What can the real reason be for it to stop functioning?

Hi, I’m having the same issue, do you know if that cap also fits into 328i 2009

Good shit 👍🏾

HI.Wish I knew..The stealer didn't say any thing about the vc...They took care of two recalls but did not mention the vcg was covered as well.Wish I know..Oh well.My buggy is up and running w/ a bit of a miss fire...Looks like one of the coils..May as well change all of them as once one goes...86K so they are most likely the original ones.Bosch coils are 20.00 each so Im gonna swap em out.Cheers,PGM

HELP!!!!!!! I am getting the Error codes 28A0, 2D5A, 2C58, 2BEA after changing the PCV. Do you recommend changing the Valve cover. I tried changing the Wall Cover seals as well. Before changing the PCV I just had error 2D5A and 2C58 with rough idle and engine reduced power message but engine was having power

eBay link is broken. What brand was that aftermarket valve cover

GREAT DIY! Now I am tempted to see if there is a way to do this on my N52. Any ideas?

It is not the excess pressure that makes the noise... It's the flow of air though the broken valve when it fails to close when the specified level of vacuum is reached inside the engine. You should have tried opening the oil cap while it was whistling, you'd be struggling to lift it because if excess vacuum. edit: the failure to fix is probably due to the hight of the new valve being incorrect, or too much sealant ending up inside the valve, or the new valve not sitting exactly parallel to the old inlet...

Can you do a oil pan gasket replacement on this x5 35i?? Please... i have a 2014 x5 35i 86xxx miles and is leaking from the oil pan drain plug😔 i don’t know if I should buy a whole Oil Pan for it, and I really Don’t wanna take her to the Dealership. Any suggestions?

I have this same sound happening on my 2014 x5 f15. Is it safe to drive until I can get it fixed?

Hi, what is the Brand that you used with the valve cover? Thank you

Mine usually comes about after cold starts letting the car warm to temp an then getting into boost. I can shut the car off then back on and goes away. I will say when this noise is present my boost drops drastically.