Oil Contamination on Spark Plugs Causes and Prevention

Spark plug tubes have o-rings that go bad , may want to tighten valve cover also. The oil might only be getting on the threads while you are removing them, though it might also be possible for oil to sneak past the plug ... 1992 - Up: Aeros & Whales 4.6L Based Powertrains 4.6L Archive Steering, Suspension and Brakes Body and Interior Modular High Performance 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 ... 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 ... Most likely you leaking oil through this gasket down into the spark plug well. Check this 1st. if that is the problem just get some gasket sealer and repair it. Oil on the plugs isn't from the valve cover gaskets in our case, it is from the spark plug seals which are built-in to the valve cover itself and cannot be ... 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. 2013 2.5i Limited w/ 165k miles. What would be the most logical explanation for this? Piston rings? Spark plug O-rings? Valve covers? That high on the plug may be a very slight leak of the valve cover gasket. I've seen some swimming in oil. But what you have is nothing to even think about ...