PTFE REAR MAIN SEAL SERVICE
PolyTetaFlouroEthylene sounds impressive, and it is. This is the latest material used for rear main seals and was originally developed for the over-the-road diesel engine market, for maximum life. Care must be taken when installing these seals. Unlike a tradition rear seal that needs some lubrication when installed, a PTFE seal must be installed dry and the crankshaft seal surface must be clean and dry as well. This facilitates a transfer of material from the seal to the crankshaft surface to form a very good and long lasting seal. Immediate leakage may occur if any lubrication is used on either the seal or crankshaft surface.
Engine Pro Technical Committee