Get the spark plugs out and observe

来源: 2011-04-06 10:38:24 [博客] [旧帖] [给我悄悄话] 本文已被阅读:

I bet they will be oilly.  If so, you may need to change the valve stem seal. 

I do not think the head gasket has any problem, or your GPM will drop dramatically.