Valve stem seals control the lubrication of the valve stem as it slides in the valve guide. Too little oil contributes to stem and guide wear. Too much oil increases oil consumption and can cause a buildup of carbon, leading to valve seat damage and early valve failure, as well as loss of engine performance and emission failures. Federal-Mogul valve stem seals ensure dependable performance and superior service life.
Federal-Mogul manufactures three classes of valve stem seals:
