Oil Fouling Spark Plugs A Comprehensive Guide

If there is oil in the bottom of the well chances are the valve cover gasket is leaking. There is a seal around the bottom of each well. 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 ... Generally if an engine is burning oil the plugs will be sooted up and black, not oily wet. That sounds like an engine that was started and shut down pretty ... deteriorated o-ring. The valve cover includes a seal known as spark plug o-rings. Heat tends to deteriorate the deal over time and allows for ... 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 ... The spark plug tube seals will be difficult to get out of the valve cover, so don't be afraid to put some muscle into it. The new ones should ... The oil build up around the spark plug is a leaking valve cover gasket. But the plug oil fouling is a different problem . Liquid oil on a otherwise clean spark plug is a leak. Thick caked on carbon and traces of liquid oil would be a very worn engine. If you have oil in your spark plug hole then there is a 99.99% chance that the valve cover gasket is the culprit. Could be that the valve cover gasket is allowing oil to leak down the spark plug hole. Try replacing the valve cover gasket.