What causes oil to collect in the spark plug hole?
When changing spark plugs on my 2001 Ford F-150 triton 5.4L engine I
noticed oil collected in the spark plug hole before I pulled the old plugs. What
can cause this and will it affect engine running normal?
leaking valve cover gasket...
The oil could attack the coil boots and break them down so I would fix the leak.
Leaking spark plug well gasket that is part of the cam cover gasket set. Get it replaced. It will require removal of the cam cover.
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