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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > Valve Cover - Oil Leak



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      03-03-2018, 07:39 PM   #1
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Valve Cover - Oil Leak

I am new to BMWs - picked up an E91 - 2010 328xi wagon (AT with 120K miles) a couple of weeks ago. Checking on all the potential and apparent issues and see oil coating a portion of the valve cover. I know that the valve cover gaskets go at some point but this looks like it is coming from somewhere from above. The other bolts along this side are clean so the leak appears to be at this one spot.

Can anyone shed any light? What part of the cover is right above this spot and what could the problem be?

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      03-03-2018, 07:43 PM   #2
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Looks like coming from valvetronic motor or it's gasket but just take off the cover to see exactly where.....could be cracked VC too.
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      03-03-2018, 08:38 PM   #3
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Would help if you removed the engine cover...


Oddly enough the oil filler cap is known to leak too.
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      03-03-2018, 09:51 PM   #4
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Quote:
Originally Posted by wren57 View Post
Would help if you removed the engine cover...


Oddly enough the oil filler cap is known to leak too.
Yes, removing the engine cover would help and that is probably what I will do to track this down. But I thought that based on what I could see right now, before doing that, someone might have some insight. I am new to BMWs so I am not familiar with some of the common problems and issues that those with BMW experience already know. On the other hand, I know a bunch of these for Subarus and C5 Corvettes.

I did wonder whether the leak could be from the filler cap, since it is just above the area in question. Is it the cap that does not seal properly or some problem with the top of the filler tube?
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      03-03-2018, 10:55 PM   #5
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It could be the valvetronic motor gasket as someone mentioned. I once had the same problem last summer and felt weird because i just had my VCG replaced not long ago. And it ended up that it was the valvetronic motor gasket.
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      03-03-2018, 10:56 PM   #6
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Take the cover off. Theres a chance its from the oil filler. Spills are pretty common.
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      03-04-2018, 10:31 AM   #7
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So, pulled the engine cover and it does appear to be coming from the valvetronic motor so it looks as though that gasket is done.

Online DIYs say that when repairs are performed on the Valvetronic assembly, the limit stops have to be relearned and a BMW scan tool is needed to do this procedure. But it also says that when just removing the motor to replace the gasket you are not changing the mechanical position of any Valvetronic assembly components, so a relearn is not always needed. How often would a relearn be necessary? If the scan tool for a relearn is not necessary, then it is a DIY for me.

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      03-05-2018, 05:47 PM   #8
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You're going to want to post/search in the N52 forum for that. Might not get a response here in general.
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      03-05-2018, 06:18 PM   #9
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Quote:
Originally Posted by K9Leader View Post
So, pulled the engine cover and it does appear to be coming from the valvetronic motor so it looks as though that gasket is done.

Online DIYs say that when repairs are performed on the Valvetronic assembly, the limit stops have to be relearned and a BMW scan tool is needed to do this procedure. But it also says that when just removing the motor to replace the gasket you are not changing the mechanical position of any Valvetronic assembly components, so a relearn is not always needed. How often would a relearn be necessary? If the scan tool for a relearn is not necessary, then it is a DIY for me.

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Let me know what you found cause I'm curious about that too
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