Hi I have a 95 olds Cutlass supreme 3.1L engine loosing coolant no external leaks so I pressure tested the cooling system I could hear air coming from the oil fill hole and the oil is up 1 to 2L above normal, I need a little help to figure out if its the head gaskets or the Intake gasket, I'm not getting any white smoke from the exhaust. If someone can help to figure out which one it is would be great.
Thanks