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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 12-17-2013, 05:56 PM   #1
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Join Date: Aug 2008
Location: Cleveland School, NC
Posts: 24
My Ride: 02 325iT 01 330i
325iT cooling system question- manual trans-specific

I'm doing most of the cooling system on my wife's 2002 325iT 5 speed. I'm replacing most, if not all of the "normal" stuff (Rad, hoses, Water pump, etc).

The only thing I'm not replacing that most people probably would is the expansion tank- since it's only about 1 year old (I replaced just this tank when it blew out).

I'm having a problem getting the expansion tank to "seat" on the small connector on the expansion tank "bracket" that attaches to the driver's side of the radiator. I bought a new BMW bracket along with the other parts mentioned above.

I've searched and I've asked some friends about this, but no one has a definitive answer. The large port on the bracket is seating just fine (it's the one with the locking clip, the small port has no clip). I'm seriously considering buying a new Expansion tank, but wanted to see if anyone had any experience/advice about this issue first.


EDIT: To clarify, the "bracket" I'm talking about is 17111436250 or #1 in this pic:

Last edited by Rigmaster; 12-17-2013 at 06:01 PM. Reason: clarification
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Old 12-17-2013, 10:53 PM   #2
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Join Date: Aug 2008
Location: Cleveland School, NC
Posts: 24
My Ride: 02 325iT 01 330i
Well, after looking at this thread (http://forum.e46fanatics.com/showthread.php?t=906997) I think I'm gonna order some o-rings for the bottom of the expansion tank and see if that does the trick.

I'll let you know how it turns out, but still interested in hearing any other theories.
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Old 12-17-2013, 11:49 PM   #3
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Join Date: Nov 2011
Location: San Diego
Posts: 549
My Ride: 328i, M3, 525iT
Lubrication will help immensely, silicon o-ring grease is best, in a pinch you could use a small amount of vaseline. Should snap together like a lego with the grease. A dry o-ring will grab and twist.
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