Oil on Spark Plugs A Diagnostic Tool for Engine Health Assessment

Oil in the spark plug wells is symptomatic of a valve cover gasket leak. Not a really difficult DIY job - perhaps 2 hours the first time through ... 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. Oil in Spark Plug Holes · 1. After pulling each plug coil, wipe them clean of oil. · 2. I found oil at the base of the insulator (right most- ... The most common oil on spark plugs symptoms can include the following ... 1. Blue smoke form exhaust ... 2. Reduced fuel economy ... 3. Reduced engine ... It looks legit, that is if you actually get that identical part. The few times I've bought OEM items off ebay I normally see if the seller is ... If the tip of the coil is wet with oil you have plenty in the well. If not, take a twisted paper towel and work it down along the side of the ... 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 ... If the plug electrode shows no such signs of being fouled by oil then most likely the VCG is not properly seated/sealed; that is the only other way oil can get ... 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. 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.