Oil on Spark Plugs A Diagnostic Odyssey for Engine Health

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 ... It's not a big deal but you do need to identify and correct the cause of the leak (needs plug tube seals and quite possibly the valve cover gaskets). Spark plug tubes have o-rings that go bad , may want to tighten valve cover also. 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 ... 2010 1.8 L Honda engine's spark plugs do not go through the valve cover. Maybe the valve cover is leaking and entering the spark plug tube below the valve ... If theres still oil in the spark plug hole it's the valve cover gasket. It's a very common issue and a quick and easy job. Thats called corona and is a naturally forming gunk caused by the electric field around the outside of the plug. The oil is probably coming from ... If is running too "rich" then you should see black smoke, when it is extreme, and see a black build up on the plugs. I would also expect codes ... While using a nickel based anti-seize compound is acceptable. Never use oil. The area where the spark plugs screws into can get hotter than what ... Make sure you replace those tube seals (that's what keeps the oil out of the spark plug tubes), they should come with the valve cover as long as ...