Abstract: A resilient metal seal that includes a PTFE jacket or liner capable of improving the sealing performance of the resilient metal seal and providing a near chemically inert surface to protect the seal from coming into contact with potentially damaging media is provided. In some embodiments, the resilient metal seal is an E-, U-, C-, or V-shaped resilient metal seal. A jacket made of PTFE or similar material can be included on the interior or exterior surface of the resilient metal seal. The jacket can include a locking feature to prevent against the jacket becoming dislodged from the resilient metal seal.

Abstract: A head gasket assembly is provided comprising a solid non-compressible or rigid gasket body comprising a plurality of apertures for engine coolant, oil and combustion chambers. The gasket body has grooves formed therein for retaining and controlling the compression of elastomeric seals used for sealing engine coolant and oil apertures. The gasket body is then fitted or accompanied by a combustion seal. The combustion seals are specifically designed for the particular engine application, based on temperature, pressure and other operating characteristics. This assembly allows a direct fit with standard engine technology and requires no machining of heads, blocks, or cylinder liners. The result is a gasket body that precisely controls the compression on the seals, which improves engine performance without any machining of the engine while carrying highly elastic compounds to seal coolant and oil.