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COMP Cams V-Thunder 5/16in x .500in PTFE Valve Oil Seals, 12 Pack

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COMP Cams892460
Part # 513-12
SKU # 892460
This item is unavailable.
Part #513-12
SKU #892460
Inside Diameter0.3125 in.MM
Valve stem oil seals. 1 year limited warranty.
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    COMP Cams offers a complete line of valve stem oil 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, and in the case of a double spring, the positive stop PTFE seal is used. Smaller diameter Viton seals are also available for triple spring applications. Both the o-ring and the umbrella seals require no machining, but when using the PTFE seal it is necessary to disassemble the heads and machine the top of the guide with a special cutter.