Spark Plugs and Oil A Diagnostic Tale of Engine Health

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 ... 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 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. The seals harden and crack over time. When this happens, oil seeps into the tube and coats the exposed part of the top of the spark plug. The ... It's the spark plug o-rings. Just take off the valve cover and replace them. There are 4 total and are included with the valve cover gasket set. Carb cleaner, compressed air. Wrap a rag around the blow gun. Repeat as necessary until oil removed. Follow up with brake cleaner, repeat until ... 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. deteriorated o-ring. The valve cover includes a seal known as spark plug o-rings. Heat tends to deteriorate the deal over time and allows for ... 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 ... 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 ...