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Old 01-23-2013, 05:04 AM
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bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
 
Join Date: Mar 2008
Posts: 25,236
Mein Auto: 02 BMW 525i M54 auto 130K
Quote:
Originally Posted by Fudman View Post
Well, THAT hasn't happened!
That's the way for most of us.

In fact, this is a picture (from this classic priming-oil-filter thread) of my very first oil change (please ignore the embarrassing $18 STP filter! I've since learned my lesson.)


Given this picture from this thread, I doubt my o-rings have EVER been changed (since I'm only the 2nd owner):



According to cn90, those two o-rings don't seem 'all' that important, functionally, though:
-> E39 (1997 - 2003) > DIY: E39 Changing engine oil made simple (how to do it in 30 minutes and not crying!)

Note: The diagram below is from this thread.

Note: The diagram below is from this thread.


EDIT: Doing research as to WHAT each of these o-rings does, I find this interesting comment and video:
Quote:
Originally Posted by fuzzynations View Post
I did a few searches and found the round o-ring gasket for the oil filter housing fails, and the inside of the filter has a weak seam allowing unfiltered oil to pass through.

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Last edited by bluebee; 01-23-2013 at 05:57 AM.
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