Post by
yellow_jacket »
https://forums.nicoclub.com/yellow-jacket-u4236.html
Fri Nov 25, 2005 3:55 am
This is a fairly common problem. It is almost always just the seals between the valve cover and the head. In your case since you got the valve cover powder coated, make sure that the sealing surfaces aren't all filled with paint. If they are, clean them out and get a new oem gasket straight from the dealership. NAPA gasket kits usually do pretty well. That will take care of you. I would also think about changing the plugs and wires out. They don't like being submerged like that and it tends to break them down and cause shorts.
The chances of this being a head, ring, or headgasket problem are about 1 in a billion. It just is not feasable for the head to crack in 3 different spark plug holes. Rings wouldn't cause this either, nor a blown head gasket. Now if oil were getting down into the cylinders, then you would look at rings, headgaskets, and heads.