Rear Main Seal, Stock Rope Type

Description

The crankshaft rear main seals installed by Oldsmobile were these rope type seals. If you ever tried to get a rope rear main seal to seal and stay sealed on an Olds that sees irregular use, you know it is all but impossible. The best way to seal one and keep it sealed is to upgrade to this modern style molded neoprene seal. See part numbers ms350 and ms455.