Enginetech S438V-25 Valve Stem Oil Seal OE Type Positive

The Enginetech S438V-25 valve stem oil seal (also called a valve seal or valve guide seal) is an OE-type positive seal. It helps control oil on the valve stem and keeps oil from being drawn down the valve guide into the combustion chamber. Worn or hardened valve seals are a common cause of excess oil consumption and blue smoke at startup, so replacing them is standard practice in an engine rebuild or cylinder head service.

Key Features:

• OE-type design, intended as a direct replacement for the original seal
• Positive-type seal that locates on the valve guide
• Enginetech OE-type seals are made from OE-type materials such as Viton, polyacrylate and nylon
• Made for engine rebuilders and professional machine shops

OE-type Enginetech seals are recommended for standard OE-diameter valve stems. Enginetech has supplied engine rebuilding parts since 1982.