![COMP Valve Stem Oil Seals, Metal Body Viton Seal (CO514-16)](http://fastlanespares.co.nz/cdn/shop/products/CO514-16_940x689.jpg?v=1688039020)
COMP Valve Stem Oil Seals, Metal Body Viton Seal (CO514-16)
Suit 3/8" Valve, .500" Guide, .625" O.DCO514-16 - VALVE STEM OIL SEALS, 3/8"
Suit 3/8" Valve, .500" Guide, .625" O.D
Part Number: CO514-16
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 largerthan-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, which can also be found on this page.