Oiled Up Deciphering the Meaning of Oil on Spark Plugs

If you have oil on the spark plugs then you most likely have faulty piston rings or valve stem seals. You'll need to do a compression test. If ... 2013 2.5i Limited w/ 165k miles. What would be the most logical explanation for this? Piston rings? Spark plug O-rings? Valve covers? Oil in the spark plug tubes is caused by shrunken and hardened spark plug tube seals, which can easily be replaced by just pulling the valve covers. It's the valve cover gasket at the spark plug hole. It won't hurt anything. Ig you want to fix it you have to replace the entire valve cover. My ... Spark plug tubes harden where they meet the valve cover. This will allow oil to pass over time. You might be able to reuse the valve cover but ... 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. The fix is to replace the valve cover and the 6th gen covers don't have the oil leak issue while being a direct fit replacement. 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 ... The rubber seals on the spark plug tubes are probably leaking, remove the valve cover pull out the sleeves and see if the rubber seals have ... In most cases, oil on the spark plug threads indicates that you have a leaking valve cover gasket. This gasket sits between the cover of the ...