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The content contained in this article is for informational purposes only and should not be used in lieu of seeking professional advice from a certified technician or mechanic.
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Learn more about Fel-Pro quality gaskets that are specifically designed for the repair environment, find your car part, or find where to buy your auto part today. It protects the inner lip of the seal from damage by the lock grooves in the valve stem. This tool is a thin plastic sleeve which is placed over the tip of each valve stem during installation. On applications which use different seals on the intake and exhaust valves, due to needing higher temperature material on the exhaust side or different design, the seals will be bagged and labeled appropriately.Īn installation tool is included in Fel-Pro valve stem seal (VS) sets. On some applications, the valve stem seals are interchangeable between the intake and exhaust valves and will look exactly the same. FKM offers excellent resistance to both heat (up to 450☏) and abrasion. It is often combined with a metal jacket or covering that totally surrounds the FKM positive seal. FKM, fluoroelastomer, is used in many Fel-Pro valve stem seals for hotter-running, late-model vehicles. Fel-Pro uses a variety of materials including nylon, PTFE, rubber, steel and synthetic rubber or some combination of these. You can count on Fel-Pro to use the right material for each application. However, a lower-quality seal with insufficient heat-resistance will harden and crack prematurely and will not work as intended.
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Visually, a lower-quality seal may look very similar to a high-quality seal that’s appropriate for a given engine platform. This type of analysis makes one thing clear, not all valve stem seals are created equal. Based on the analysis, we determine the material used, considering the durometer (relative hardness) of the rubber, temperature requirements (both extreme heat and extreme cold), resistance to common oil types, tear-resistance and leak rate. Fel-Pro engineers analyze the OE design for every application.
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