Acesway,
More likely or not the oil is coming from the valve cover gasket leaking and working its way down to the spark plug recesses.
The bubbling could be either a very slight leak from around the spark plug due to a earlier cross thread or the like, or just cooking from the heat of the plug, the head, the exhaust.
Oil likes to work its way from the front of the engine towards the back and down....give the bolts on the valve cover a little snugging up (DON'T get heavy handed and warp the cover) and see if that takes care of the problem if not there's a valve cover made of neoprene which stands up much better than the standard cork ones.
TJ
__________________ 90 LX 2.3 N/A 5spd
15:1 rack
homemade intake
suspension upgrades in progress |