Replacing downpipes and found oil

illrider · 12-04-2014, 09:49 AM

I was underneath my 335i reinstalling stock downpipes for some warranty work when I noticed that the underbody plastic near the downpipes was wet with oil. After removing the plastic i noticed the downpipes had some marks on them from what looks like oil dripping onto them. I then noticed a bolt next to the downpipes damp with oil I have attached a couple pictures of this bolt. Any ideas what could be leaking to cause this?

APTF · 12-04-2014, 10:00 AM

There are a few possibilities for your oil leak:

1. Valve cover gasket needs to be replaced (most likely)
2. Rear main seal on your transmission needs to be replaced

12-04-2014, 09:49 AM	#1
illrider Second Lieutenant 26 Rep 215 Posts Drives: 08 E90 Join Date: Jul 2011 Location: Mesa, AZ iTrader: (1)	Replacing downpipes and found oil I was underneath my 335i reinstalling stock downpipes for some warranty work when I noticed that the underbody plastic near the downpipes was wet with oil. After removing the plastic i noticed the downpipes had some marks on them from what looks like oil dripping onto them. I then noticed a bolt next to the downpipes damp with oil I have attached a couple pictures of this bolt. Any ideas what could be leaking to cause this? Attached Images
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12-04-2014, 10:00 AM	#2
APTF Private 5 Rep 90 Posts Drives: E92 N54 Join Date: Nov 2014 Location: Toronto iTrader: (0)	There are a few possibilities for your oil leak: 1. Valve cover gasket needs to be replaced (most likely) 2. Rear main seal on your transmission needs to be replaced
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