Join Date: Sep 2006
Location: Burlington, Ontario
Any ideas for eliminating an oil leak permanently?
This is a simple problem that is really annoying me. I have an '85 Crown Vic with the 302 (5.0 litre) engine. It's leaking oil from around the timing cover. No big deal, right? Well, not normally, except that I've done the job twice and the leak just re-occurs.
History - I'm not an idiot, nor a newbie, to engine repairs. Usually when I fix an oil leak, it never returns. Obviously my Crown Vic has a sense of humour.
Does anyone have any wild ideas to seal this thing to prevent it from ever leaking again? It use to leak when I first got the car two years ago. Earlier this year, it was necessary to replace the waterpump, so while I was at it, I knew it would be a good opportunity to fix the leak at the timing cover. A new gasket was purchased. I even used some high-temp silicone sealant (which was also recommended in the kit). The leak was "fixed" for a little while. Now it's as bad as it always was.
I also have noticed that some of the bolts that secure the timing cover to the block loosen over time. Re-tightening to spec doesn't fix the leak, though. Naturally this is due to the fact that the timing cover is aluminum, and expands & contracts at a different rate than the hardened steel bolts, and the cast iron block.
Surely I can't be the only one with this problem. Too bad there wasn't a neoprene (similar to rubber) gasket available as opposed to the silly paper gasket - I know that would be the ultimate resolve. I replaced my valve cover gaskets with the neoprene ones, and haven't had a drop of oil leak in those areas.
Open to ideas - even considering welding at this point (just kidding). I've tried two different types of silicone now, too - still no luck.