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Old 01-23-2013, 06:04 AM
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bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
 
Join Date: Mar 2008
Posts: 22,005
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.

__________________
Please read the suggested threads, where the best always add value to those threads, either by pictures or by descriptions, so the next person with the same problem stands on your shoulders.
See also: E39 Bestlinks & How to easily find what you need

Last edited by bluebee; 01-23-2013 at 06:57 AM.
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