BBC Roller Thrust Bearing .142 Thickness

The BBC Roller Thrust Bearing .142 thickness by COMP CAMS is a precision component engineered for big-block Chevrolet engines that demand reliable crankshaft support under extreme load and RPM conditions. This roller thrust bearing sits at the critical interface between your crankshaft and engine block, managing the forward-and-backward thrust forces generated during acceleration, deceleration, and sustained high-RPM operation. Whether you're building a street performance motor or a competition-grade powerplant, a quality thrust bearing is non-negotiable—it prevents catastrophic crank walk that can destroy your engine in seconds.

COMP CAMS' roller design replaces stock bronze thrust surfaces with hardened steel rollers that distribute side loads more evenly across the bearing face, reducing friction and heat while dramatically improving longevity compared to older sleeve-style bearings. The .142-inch thickness is precisely engineered to fit BBC crankshaft saddle geometry without requiring machine work, and the roller configuration minimizes wear patterns that plague flat-face bearings in high-output applications. The hardened steel construction maintains dimensional stability across temperature swings and resists the micro-spalling that occurs when bronze contacts cast-iron saddles under boost or high nitrous flow.

This bearing is essential for any BBC engine running significant power—turbocharged setups, supercharged platforms, big-displacement naturally aspirated motors, or competition fuel combinations where crank thrust loads exceed factory limits. Installation requires removing the crankshaft and carefully positioning the bearing in the rear main saddle, making it a job best suited for engine builders or experienced mechanics with block-out tools. Use this bearing when rebuilding your BBC block or upgrading from original equipment; it's a modest investment that eliminates one of the fastest ways to turn your engine into scrap metal.