Oil-Soaked Spark Plugs A Red Flag for Engine Malfunction

The odds-on bet is a blown head gasket. Of course, there are other ways to get oil there. If it is only oil on 1 spark plug then you can rule out the easy to ... This is the valve cover gasket leaking and maybe loose spark plugs as well. Lucky for you all you would need to do is either replace the gaskets and/or tighten ... 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. 2013 2.5i Limited w/ 165k miles. What would be the most logical explanation for this? Piston rings? Spark plug O-rings? Valve covers? 1 of the spark plugs had oil on it, both on the electrode and on the threads. I don't see oil anywhere else, top seems dry. The other 5 spark plugs were ... oil in the spark plug tube indicates that the tube seal has failed. The only way to resolve this is by replacing the valve cover itself as well ... Spark plug tube seals are starting to dry up and let oil by. Buying a valve cover gasket set will give you new tube seals along with cover ... It seems to be a common issue and many find the seals are fine and that it is a oil fuel mix that works it's way up the plug threads over time. 1992 - Up: Aeros & Whales 4.6L Based Powertrains 4.6L Archive Steering, Suspension and Brakes Body and Interior Modular High Performance It could be a lot of things.. is the oil on the INSIDE of the cylinder, or on the outside where the spark plug wire boot connects? If its on the ...