E46Fanatics - View Single Post - Oil leak and filter cap replaced
View Single Post
Old 10-07-2012, 08:02 PM   #3
Registered User
Join Date: Jul 2009
Location: Dayton, OH
Posts: 59
My Ride: 2003 325i 104,000 mi
filter cap o-ring in the groove

Originally Posted by dmax View Post
Many have put the o-ring on the oil filter cap the wrong place. It sits in a groove about 1/2" below the flange. Some add an o-ring when one is already there. You just should have one. If it's been misshapen, just get another one...probably need to buy a new filter, but maybe dealer will have it by itself.

Same thing with PS reservoir cap. There is a $2 gasket that's replaceable. You have to trust me you have a gasket...it will be invisible, but if you use a knife carefully, you can get under it. Also, check the hoses beneath PS reservoir too...they leak all the time...new screw clamps should fix that up.

Oil from the filter cap is common(ish) because of what I said. Don't crank the cap down too hard either. I don't think you needed a new cap, but it won't hurt. I hope it's just the o-ring in the wrong place...make sure it's in the groove.
The o-ring is in the correct groove. I don't know how people could miss that one but I guess it happens. I replace the vanos and vcg about a year ago so I know it's not the vcg. I may have tighted it too tight so I will check it again.

When I had the car in for a BMW recall on the rear tail light issue in Feb, they said the Oil filter housing was leaking and they wanted $1300 to fix. I just didn't think the lower gasket leak could get up to the top of the oil filter cap. It is oil and not PS fluid for sure.
2003 325i 104,000 miles
bimmer2u is offline   Reply With Quote