Hello all .. Question.,,, while changing all 16 plugs.. I went to change the pass. side and notice oil on top of valve cover.. See picture.. Is there a gasket underneath there or atv sealer... It seems to be leaking..

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Peter L. House
1998 Sport E430
Azure Blue
110,000k Miles

1987 Oldsmobile Cutlass Salon
V8 Bucket Seats
Factory Moon Roof