Fel-Pro 2921 Rear Engine Main Seal Set

Rear main seals keep oil from leaking at the rear of the crankshaft. Most rear main bearing seals are made of either rope or synthetic rubber materials. Older engines usually have a rope style seal, which is tricky to install. Molded synthetic rubber style seals are common today. Fel-Pro makes rear main seals from different materials based on the application and the need for heat resistance.