Valve Seals: Metal Body Viton SealCOMP Cams® offers a complete line of valve stem seals, from the stock GM O-Ring to the positive-stop PTFE seal. These seals are a must...
COMP Cams® offers a complete line of valve stem seals, from the stock GM O-Ring to the positive-stop PTFE seal. These seals are a must to keep unwanted oil from entering the combustion chamber through the clearance in the valve guides. The O-Ring seals use the standard retainer and oil splash shield. The umbrella seal is normally used when a larger-than-stock diameter spring is used, in the case of a double spring, the positive-stop PTFE seal is used. We also have a smaller diameter Viton seal available for triple spring applications. Both the O-Ring and the umbrella seals require no machining, but with the PTFE seal it is necessary to disassemble the heads and machine the top of the guide with a special .530 diameter cutter. Whenever you are planning an engine overhaul or a cam change, don't forget the valve seals.
For 4 Cylinder use -8 suffix, for 6 Cylinder use -12 suffix.
