Rear Crank Seal SBC 400

The Rear Crank Seal SBC 400 from Peterson Fluid is an essential engine component specifically designed for Small Block Chevy 400 applications. This seal effectively seals the crankshaft at the rear main bearing, preventing oil leakage from the engine block and ensuring proper lubrication pressure. It is particularly useful for those rebuilding classic muscle cars, restoring street rods, or maintaining high-performance 400 Small Block engines.

Engineered by Peterson Fluid, a reputable name in automotive sealing solutions, this rear crank seal is manufactured to precise tolerances for a factory-tight fit against the crankshaft's rear flange. The seal is made from an oil-resistant elastomer compound that withstands high-temperature oil exposure while maintaining flexibility across various engine operating ranges. This design helps prevent hardening and cracking, which are common issues with inferior aftermarket seals.

This rear main seal is a critical component during engine rebuilds, gasket replacements, or any maintenance that involves disassembly of the engine. While it is highly recommended to replace the rear main seal during these processes to avoid potential oil leaks, the necessity may vary based on the condition of the existing seal. Ensuring a proper fit and function of this seal can help protect your engine internals from costly oil loss.