Timken 5072 Engine Crankshaft Seal - Rear

Timken 5072 Rear Main Seal

Timken 5072 is a rear main seal for the engine crankshaft, built with a rubber-coated steel construction and manufactured to meet or exceed OE specifications. It is a direct-fit sealing solution for a wide range of Chevrolet, GMC, and Oldsmobile applications, including classic big-block and small-block V8 platforms.

Key Features

• Engine rear main seal for crankshaft sealing at the rear of the engine
• Rubber-coated steel construction for a secure sealing surface
• Built to meet or exceed OE specifications
• Compatible with rear-position applications across multiple Chevrolet and GMC models
• Timken part number 5072 for easy identification

Application Details

Compatible with rear main seal applications on vehicles such as the Chevrolet Impala, Chevrolet Caprice, Chevrolet El Camino, Chevrolet Monte Carlo, Chevrolet Corvette, Chevrolet C10, Chevrolet K10, Chevrolet G30, GMC P3500, and Oldsmobile 98. This Timken 5072 seal also covers select big-block applications, including 1965-1969 Chevrolet Impala, rear, Big Block and 1970-1972 Chevrolet Monte Carlo, rear, Big Block.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Is Used For

• Stopping engine oil leakage at the rear of the crankshaft
• Replacing a worn or hardened rear main seal
• Addressing oil seepage from the bellhousing area
• Restoring proper crankshaft sealing on older GM engines
• Supporting maintenance on high-mileage Chevrolet and GMC engines

Installation Notes and Tips

Verify engine configuration and rear seal style before installation, especially on big-block and model-specific applications. Clean the sealing surfaces thoroughly and inspect the crankshaft sealing area for wear, scoring, or contamination before fitting the new seal. Confirm the vehicle year, make, model, and rear-position application against the fitment list for Timken 5072.

Quality Assurance

Timken manufactures this rear main seal to meet or exceed OE specifications, with a rubber-coated steel design intended for consistent sealing performance in approved applications.