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-   -   Oil coming out of rear O2 sensor (http://www.bimmerfest.com/forums/showthread.php?t=652188)

elmachin 10-16-2012 09:38 AM

Oil coming out of rear O2 sensor
 
Has anyone seen this before or know the cause of oil coming out of the rear O2 sensor.

It's a E46 99 328i

Thanks,
Matt

smolck 10-16-2012 10:23 AM

Quote:

Originally Posted by elmachin (Post 7137515)
Has anyone seen this before or know the cause of oil coming out of the rear O2 sensor.

It's a E46 99 328i

Thanks,
Matt

Something very bad would have to happen for that to take place. More likely your valve cover is leaking onto your exhaust and around the 02 sensor

elmachin 10-16-2012 12:09 PM

I don't think it's coming from the valve cover. Here's a picture.

https://docs.google.com/open?id=0Bz8...WJRbzFGX1kzYnM

smolck 10-16-2012 02:32 PM

I cant see a picture, that link is bad.

BigJon53 10-16-2012 07:07 PM

Quote:

Originally Posted by elmachin (Post 7137515)
Has anyone seen this before or know the cause of oil coming out of the rear O2 sensor.

It's a E46 99 328i

Thanks,
Matt

I can see the picture, but it is too bright in the area you are trying to show. I think Smolck is right, that is right in the area where you are going to see oil from the valve cover leaking. It falls on the manifold and burns off. The oil that falls on the O2 sensor just may not be burning off, so it only looks like it is leaking oil. If you really have oil coming from the O2 sensor, you have got way bigger problems.

cvx5832 10-17-2012 08:45 AM

Definitely the VCG, you can already see it on the heat shield.

gesoffen 10-18-2012 03:55 AM

x3 on a leaky VCG (assuming the dark portions on the heat shield aren't underexposed areas of the picture). I'd recommend getting a replacement valve cover (includes perimeter and spark plug gasket) as well as the 15 sealing grommets for the bolts. Chances are you'll crack your existing valve cover if you replace just the gasket.

ahull 10-18-2012 05:31 PM

Quote:

Originally Posted by gesoffen (Post 7141882)
x3 on a leaky VCG (assuming the dark portions on the heat shield aren't underexposed areas of the picture). I'd recommend getting a replacement valve cover (includes perimeter and spark plug gasket) as well as the 15 sealing grommets for the bolts. Chances are you'll crack your existing valve cover if you replace just the gasket.

Why would the vc crack when replacing the gasket? I would think chances are it won't crack unless you're just careless or don't properly torque the bolts. :dunno:

TannerT 10-19-2012 06:53 AM

Quote:

Originally Posted by elmachin (Post 7137515)
Has anyone seen this before or know the cause of oil coming out of the rear O2 sensor.

It's a E46 99 328i

Thanks,
Matt

Uhh if oil is commingle out of the 02 something horrible happens as stated above it is probably ly a leaking VCG takes 2 hours Max to do.

Sent from my PantechP9060 using Bimmer App

smolck 10-19-2012 12:15 PM

Quote:

Originally Posted by cvx5832 (Post 7139875)
Definitely the VCG, you can already see it on the heat shield.

This. Clearly you can see the leak. No way the oil is coming from inside your manifold, it is an impossibility.

elmachin 11-15-2012 07:25 AM

gasket leak
 
I found a friend of a friend who works as a mechanic at a bmw dealership. He looked at it and said that it was in fact the gasket.

Thanks for your replies.

HarryR325i 11-15-2012 06:35 PM

elmachin,
hold onto that friend.


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