Oil-Fouled Spark Plugs A Symptom of Engine Wear and Tear

If u have oil down the spark plug holes most likely the tube seal failed replace all the seals around the ports and outer valve cover gasket and ... If it took that long... it was a simple solution..... it was time to change plugs anyway.. so new plugs, clean out the hole... and drive until ... If oil persists in the spark plug threads or plug wells over an extended period, it becomes a significant problem. This can lead to several issues. The oil build up around the spark plug is a leaking valve cover gasket. But the plug oil fouling is a different problem . Oil seeps down the hole that the tube is mounted into. It gets in there when the sleeve retainer seal (similar to Loctite) breaks down. You may ... Could be that the valve cover gasket is allowing oil to leak down the spark plug hole. Try replacing the valve cover gasket. Oil in spark plug wells is almost always caused by an old perished gasket. After a number of years the gasket shrinks due to constant heating ... When the tube seals on these engines leak, the entire well will fill with oil, and it will wick through the threads from the top down. Valve cover gasket leaks are very common after a number of years. These gaskets dry up and shrink, and the leakage often is both outside, and ... That's usually a sign that the spark plug tube seal is leaking. Likely need to get a valve cover gasket kit, remove and replace the valve cover ...