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Discussion Starter · #1 ·
what would cause coolant to be on the tip of spark plugs?
 

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how bout oil on a spark plug?
A spark plug shorted by excessive oil entering the combustion chamber is often caused by piston rings or cylinder walls that are badly worn. Oil may also be pulled into the chamber because of excessive clearance in the valve stem guides, or badly worn valve stem seals. If the PCV valve is plugged or inoperative, it can cause a buildup of crankcase pressure. This condition can force oil and oil vapors past the rings and valve guides into the combustion chamber.
 
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