Oil-Contaminated Spark Plugs A Diagnostic Journey to Engine Recovery

As for oil in the wells, pull the plug and see if the threads are wet as well. Then pull a dry plug well plug and give us focused imagery. This ... 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 ... 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. Check to see if you have any oil residue in the plugg tube, and if you do, you have to replace spark plug tube seals, it it involves pulling off ... To answer your question, the oil will not have any effect on the spark plugs, no matter the level. Oil is a dielectric, that is it is an ... I've replaced the gaskets on my 5.2 V10 twice now and still fight oil leaks in the spark plug wells. It's a on going battle. If anyone has tips or tricks to ... 2013 2.5i Limited w/ 165k miles. What would be the most logical explanation for this? Piston rings? Spark plug O-rings? Valve covers? The spark plug being wet with oil could be from three things. 1. worn rings. 2. hardened valve guide seals. 3. stuck rings on that cylinder ( ... If you have oil in your spark plug hole then there is a 99.99% chance that the valve cover gasket is the culprit. It's probably your valve cover gasket. Replace it. I stick with OEM gaskets when it comes to stuff like that. I paid $15 for mine which includes ...