2002 Saab 9-5 Q&A

2002 Saab 9-5 Question: My father owns a 2002 SAAB. He said oil is on one of the spark plugs.

This plug also seemed striped out so he installed a heli coil. This is the only plug with oil on it. I would think it would be a cylinder problem but I am not sure? Can you assist me? Thanks Derek -
Answer 1
poss valve cover gasket seal at plug o ring -