- - oil on spark plug
02-26-2012 12:54 AM
oil on spark plug
I have an 05 TJ X w/ 4.0 6 cyl auto and 2" suspension lift on 32x11.5x15's. I had a misfire code pop so I was checking to make sure that each spark plug was properly gapped and the last one i took out had oil on the threads. I was talking to my buddy and he said it was looking towards and engine rebuild, but I was going to get your guys opinion.
02-26-2012 01:28 AM
Was the oil only on the threads and not on the firing gap? How many miles are on the motor?
02-26-2012 11:02 AM
If its just the threads if may have leaked out of the valve cover into the plug hole. If the electrode has oil on it, the rings or valve seals are bad.
02-26-2012 01:30 PM
The oil was just on the threads and it has a little over 86k on the engine
02-26-2012 03:41 PM
If it was just on the threads it probably leaked from the valve cover and isn't a concern. Valve cover gasket is an easy fix.
02-26-2012 07:38 PM
so i changed out the valve cover gasket today so we will see if it stops.
02-26-2012 07:44 PM
was about to say valve cover gasket haha happened to my buddys truck last week, gasket solved the prob ;]