Valve Stem Seal - Positive Stop - 11/32 in Valve Stem - 0.500 in Guide - Steel Body / Viton - Set of 16

Valve Stem Oil Seal

11/32" Viton Metal Body Seal for use with Triple Spring with a Total OD of .546"

Additional Information

Providing the best sealing properties and spring clearance, viton valve seals are an excellent choice in performance applications. The 517 seals have a .545" OD and fit applications with 11/32" valves and .500" OD guides.

Application Summary

Engines w/ 0.500" OD Valve Guides and 11/32" Valve Stems

Part Type

Engine Valve Stem Oil Seal Set

Product Overview

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, which can also be found on this page.

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Product Details

Product Downloads

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1.	Catalog

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

Reference Information

Valve Stem Seals, Viton®, Positive Stop, .500 in. Guide, 0.342 in. Valve Stem, Set of 16

COMP Cams offers a complete line of valve seals, from the stock GM O-rings to the positive-stop PTFE seals. They 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 seals are normally used when a larger-than-stock diameter spring is used. In the case of a double spring, the positive stop PTFE seals are used. For triple-spring applications, use the smaller-diameter Viton® seals.