92 lumina 3.1 top end oil leak

[rocktown1980]

my wife had the oil light come on today so i checked the oil. 2 1/2 qts low so i got to looking. the leak is coming from the top end but i cant tell if its head or intake gasket. the leak is in the middle of the motor on both sides (drive belt side not as bad as flywheel side) so i think that it is the intake. but i dont know if it is possible for the head to leak from under the intake. also does the distributor shaft plug have a seal or is it pressed in the hole.
and btw the coolant is nice and green and the oil is not milky at all.

[richtazz]

The oil pump drive is definitely one cause, very common problem on these engines. There is an o-ring seal that hardens with age and starts to leak. When replacing it, you'll have to remove the throttle body to gain access. I also use and old small block Chevy distributor gasket as added insurance against future o-ring failure. Fel-Pro part numbers are 70800 for the o-ring, and 70194 for the paper SB chevy gasket. The oil around the other end is probably a valve cover gasket, as the 90-93 3.1's don't have the intake gasket issues like the newer 94-ups do.