How to Change Tappet Cover Gasket Seal,,,,,, What is a tappet cover gasket? A valve cover gasket is an engine component designed to protect cylinder head hardware from the elements and prevent oil from escaping the engine. Typically, the gasket is made of plastic, rubber or cork to create a tight seal between the engine cover and engine, acting as a two-way barrier. #BestPhotographyChallenge #reelsputing #reelsfbシ #Tennessee #tbt #fuel #suspension #hanger #dubaiparts #partssupplier | Part Tips