My father is claiming that it is a valve cover gasket leak? on 2002 Saab 9-5

If the valve cover was indeed leaking, wouldn't it be external? Again thank you for your assistance on this matter.

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2 answers
valve cover gaskets normally leak externally, ck again it may just look like a v/c gasket but it could be eng blowby caused by malfunctioning pcv system
yes it would be if there is oil running down the valve cover then it could be leaking