I bought a 92 Lumina Z-34 and the seller said it had a cam cover oil
leak. The top of the engine was really dirty with a lot of oil and
whatever was leaking it had been doing it for sometime. I drove the
car 300 miles back home and lost one quart of oil. I'm pretty good
with a wrench and have rebuilt many SB chevys, but this was a different
beast. Long story short, I removed the plenum, intake camshaft covers
and the right head to gain access to what I was hoping was the leak.
Pulled the distributor oil pump shaft out, installed a new o-ring with
distributor gasket and sealed it with RTV. Also put on new rt head,
intake, crankcase breather plate, plenum and cam cover gaskets along
with new timing belt, serpentine belt, plugs and borg-warner wires. Oh
I had to buy a used DOHC 3.4L tool to make sure everything went back
together as advertised to be sure the camshafts were properly timed.
The car runs great doesn't burn any oil but there is still a very small
leak when the engine is running. I can't seem to pinpoint any specific
areas but the top of the engine is spotless with no oil at all. Does
anyone have any ideas what else normally leaks and what the fixes are?