newbird13

Why is there oil in my #5 plug and only in my #5 plug? And what needs to be done to fix? Again, any input is good input!!!!! Thanks in advance

Newbird13

Bert

What year is it, what engine is it and is the oil on the electrode or around the top?

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Bert

newbird13

1995 with the 4.6 motor. Car was running like crap so I got to looking under hood and 1st plug boot I pulled was #5 boot which was very wet with oil so i pulled plug and as it came out there was a gurgling sound. Plug was also very full of oil. I then checked each boot and plug and they were all dry. Cleaned up #5 boot and plug then replaced and ran good. A couple of days later checked again and were fine. Again any input is good input thanks for yours

Bert

That's close to where the oil is added so maybe some got spilled. There's notheing in the plug holes where oil can come in. It would have to be from above. If the cylinder head cracked is the only way and that is VERY unlikely.

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Bert

KStromberg

Hey newbird

If you have oil on just the boot, I would say that valve cover gaskets are in your near future. If you have oil getting onto your plug, you have something more going on here. Without a doubt, it sounds as if you have excess oil entering into the combustion chamber. This can be caused by excessive wear of the piston rings or wear involving the valve stem guides and/or seals. Before you condemn what I have mentioned though, I would suggest changing your PCV valve if it has been awhile. If that sucker is plugged, crankcase pressures can be too high and can cause blow-by which can get into your combustion chamber and as a result can foul your spark plugs with oil.

Good Luck!

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-1992 Ford F-150 (winter truck)
-1998 Lincoln Mark VIII LSC (fun car)13.591@101.72mph