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Spark Plug Wells Filled With Oil

Q. Hi Vincent, Thanks for the putting all the information in about.com, it is really a great site! I got lot of useful info from there. Recently, I pull out the spark plug wire and found there is engine oil in the plug hold. I really worry about the problem and would like you advise. Is it a big problem I should go fix right away?

Thanks again!

Spark Plug Wells Filled With Oil

A. There is an O-ring that seals the spark plug well and keeps oil from leaking into it. As with any valve cover gasket, it will start to leak over time. Sometimes tightening the valve cover bolts will stop the leakage, but more often than not the valve cover gasket, and well seals, will need to be replaced.

Spark Plug Wells Filled With Oil

The seals will come with the valve cover gasket set. I would get it fixed as soon as possible. The oil will cause the spark plug boot to swell and lead to a misfire. This will certainly hurt engine performance as well as a possible engine fire.

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