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Has anyone figured out where the oil on the spark plug tip was from?
(not from the spark plug tube I'm 100% sure since the oil is on the thread and tip only)
I had all my spark plug replaced a couple of weeks ago noticed oily tips/threads on the old plugs for my bank 5 and 7.
The replacement solved the problem at the beginning but now it's getting worse.
I have missing cylinders (rough fire not miss fire) when cold start.
It gets better when the engine is warmed up or simply by pressing on the throttle
But I believe it's not because of the valve cover gasket leak neither the spark plug tubes
(I just got them all replaced)
Is there anything in between the crankcase and the valve case like a sealing gasket for the spark plugs?
Please help!!!
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