From digest.v7.n227 Fri Sep 5 20:20:08 1997
From: Andrej Gaspari <aeg_at_computer.net>
Date: Fri, 05 Sep 1997 17:18:25 -0400
Subject: <E28> Common oil leaks
> my '88 535i is leaking a bit of oil. I haven't tracked down the place from where it leaks.
> Could you please share your experience with me about common oil leaks and possible fixes
> for the M 30 engine and/or the transmission ?
Well, in my experience, it might be any or all of the following:
- -Oil pressure sender. In the rear of the cylinder head. Leaks and the
oil ends up coming down the back of the engine. Easy fix - get a new
- -Rocker shaft end seal cover plate (or something like that...) Plate
held on by 6 bolts on the back of the cylinder head. Real PITA to get
at, unless you have very small and limber hands. Both the gasket and the
fat rubber-filled washer on one of the bolts leak.
- -Head gasket. These seep a good bit. Not much to do but replace it.
Probably not worth it for a little oil.
- -Valve cover gasket. Same seepage as the head gasket, made worse if the
cam cover has been off for valve adjustment (or whatever) and the gasket
reused. Easy to replace - I just did mine today.
Of course, there are other possibilities, but these are the more common
ones. Good luck.
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