SCE GASKETS 17904 SCE Gaskets 17904 Rear Main Seal for Oldsmobile V8 307-350 and 403, 1965-1990

Restore dependable sealing at the rear of your Oldsmobile V8 engine with the SCE Gaskets 17904 Rear Main Seal. This two-piece rear main seal is designed for Oldsmobile V8 engines in 307, 350, and 403 cubic-inch applications from 1965 through 1990, providing a practical replacement for worn, hardened, or leaking original seals. Its application-specific design helps support proper crankshaft sealing and reliable engine operation.
Manufactured from silicone, the SCE Gaskets 17904 is built to withstand the heat and operating conditions associated with engine rear main seal locations. The two-piece configuration is suitable for service situations where the crankshaft remains installed, helping simplify replacement compared with designs that require complete crankshaft removal. Always verify engine specifications and seal design before installation to ensure compatibility with the intended Oldsmobile application.
This rear main seal is supplied as one seal set for repair or engine rebuild work. Proper installation is essential: clean the sealing surfaces, inspect the crankshaft for wear or grooves, lubricate the sealing lip as recommended, and position both halves correctly according to the manufacturer’s installation guidance. The SCE Gaskets 17904 is a dependable choice for maintaining oil control in classic and performance-oriented Oldsmobile V8 builds.

Features:

• Brand: SCE Gaskets

• Part Number: 17904

• Application: Oldsmobile V8 307, 350, and 403 engines

• Model Years: 1965-1990

• Design: Two-piece rear main seal

• Material: Silicone

• Quantity: One seal set

• Use: Replacement or engine rebuild applications