Oil seals are made out of nitrile synthetic rubber with steel stiffener rings. Other rubbers such as viton, silicon, neoprene or poly acrylic can be used for specific applications. The stiffener rings may be stainless steel or brass where highly corrosive fluids are to be sealed. Springs are generally made of spring steel to IS: 4454:Gr.ll or from stainless steel or bronze for corrosion resistance
Custom PTFE Oil Seals and Other Seals for Your Application
Oil seals, also known as rotary shaft seals or lip seals, are a specific type of gasket designed to prevent the leakage of oil or other fluids in rotating shafts.

In conclusion, rubber valve cover gaskets and valve cover gasket sets are essential components in automotive engines, contributing to the efficiency, performance, and reliability of the engine. Understanding the significance of these gaskets and their proper maintenance and replacement is crucial for optimizing the performance and longevity of the engine.
Temperature
Make sure the fuel-pipe connections are clean. Unplug them and reconnect to the pump.