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Old 06-14-2004, 11:49 AM
Registered User
Join Date: May 2001
Posts: 90
Oil Change Help

I have a 92 500E and I'm having trouble reinstalling the oil filter canister lid correctly. I've changed the oil on this car at least 4 times before and have never had this problem so I'm hoping for some advice.

At first I thought the inner edge of the lid was hanging up on the filter itself--sometimes the filter can get tipped inside the canister--but I think the inner edge of the lid is making it past the filter. In previous changes I've been able to hand tighten the lid almost all the way down, feel that the lid is sealed securely, and then just snug it up with the socket. Now I'm having to use the socket much sooner since the nut won't turn easily by hand, and it feels like the lid is still .25" or so from sealing.

Then I thought it was the filter (I was using a Fram) so I used another filter (Hengst) but still had the same problem. I installed and re-installed the filter and lid 3 or 4 times and wasted at least an hour on this before giving up.

Does this make sense? Can anyone offer advice? On top of everything else, I've got huge blisters on my thumb and index finger from the nut being so hot--so much for changing your oil when it's hot!

1992 500E
63K miles
Pearl black/gray
Bone stock
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Old 06-14-2004, 12:00 PM
Registered User
Join Date: Jun 2004
Location: Baxter, TN
Posts: 88
You may have already looked at this but it sounds like an O-Ring is binding or getting too tight to let the cap go that last .25".
You might try putting some clean oil on the o-rings then re-assembling.
Your description of earlier oil changes is the way mine have gone together previously. I no longer change mine when hot; just let them drain longer.
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Old 06-14-2004, 12:07 PM
Registered User
Join Date: Oct 2002
Location: Portsmouth UK
Posts: 170
No help now sorry but it does not need to be so hot - just not cold - hand hot is good enough - say 100 deg F.

Have fun.

PS: Hope you have not damaged the thread (unlikely).
230 TE (W124) 1989 with 153,000 miles on the clock - hoping for at least another 100K
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