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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
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:
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.

Please read the suggested threads and add value, either by pictures or by descriptions, so the next person stands on your shoulders.
See also: E39 Bestlinks & How to easily find what you need

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