oil on spark plug...
 

I found some oil on the tread of the plug(cylinder1)... no smoke though. It only occurs in cylinder 1. Did a compression test and the result are good 230, 225, 230, 230. I chaged the valve cover gasket and the 4 rubber spark plug gaskets and still no cigar. Any thought?? when I chage it with a new plug I see it start from the base of the plug...then to the tread and to the tip... Any thoughts or suggestion.

As a matter of fact, I switch to synthetic oil (mobil1 10w30) a month ago...could it be the oil???

Re: oil on spark plug... (b18cturbo)
 

I'm seeing the same thing...My cars not even running yet...

Ill hafta see the CR\Leakdown numbers...

Dave

Re: oil on spark plug... (Suprdave)
 

My cars been running strong with out smoke or any other problems...Its just the oil on plug #1 that bothers me....

Come on ppls, someone must know something....

Re: oil on spark plug... (b18cturbo)
 

My plugs always have oil on the threads... but I am sure mine is from the valve cover leaking. Are you sure it is not leaking still?

Oil on the threads is almost always caused by a leak above the plugs.

Dustin