When Your Spark Plug Wells Fill with Oil

Does This Problem Need an Immediate Fix?

Question: What Does It Mean When Your Spark Plug Wells Are Filled with Oil?

I recently pulled out the spark plug wire and found there is engine oil in the plug well. This problem has me worried and I need advice. Is it a big problem I should get fixed right away?

Answer: Repair Oil Leaks Into the Spark Plug Wells As Soon As Possible

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.

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.

More: Classic Cars and Oil Leaks: Resolving oil leaks is a common task if you own a classic car. The valve covers are a common area in which to find oil leaks.

More on Spark Plug Maintenance

How to Replace Your Spark Plugs: Step by step instructions on how to replace your spark plugs.

How to Inspect Your Spark Plug Wires: Inspect your wires for breaks in the insulation. This can lead to arcing and a weak spark or no spark at all. That can affect your gas mileage.

How to Replace Your Spark Plug Wires: One of the major causes of a Check Engine light is is a bad spark plug wire. They should be replaced every 30,000 miles. If you're changing the spark plugs, consider changing the wires. Here's how.