Marcus, everybody has their favorite wonder goo. Mune is Wacker. NAV part # 1830858C1, 10.5 oz tube 1830856C1. This is what the oil pans on the T444E, 6.9 and 7.3L engines were put on with from factory. Surface HAS to be clean and oil free. Give it 24 hrs to c... Login to read more.