SBC Roller Thrust Bearing - .142 Thick

The SBC Roller Thrust Bearing - .142 Thick by COMP CAMS is a precision crankshaft component designed for small-block Chevrolet engines undergoing performance modifications or comprehensive rebuild work. This roller thrust bearing manages critical axial loads generated by the crankshaft, preventing unwanted forward and rearward movement that can damage other engine components or reduce overall engine longevity. Whether you're building a street engine, mild performance package, or preparing a classic SBC for competition, selecting the correct thrust bearing thickness is essential for proper crankshaft clearance and reliable operation.

COMP CAMS' roller thrust bearing design employs needle roller elements that distribute load across a larger contact area compared to traditional flat bearings, reducing friction and heat generation during high-rpm operation. The .142-inch thickness specification is engineered to fit specific crankshaft configurations and block preparations, accommodating the geometry of your engine's main bearing saddle. Roller bearings provide superior strength retention under sustained boost or nitrous applications, making them the preferred choice for modified engines that exceed stock power levels. The bearing's precision construction ensures minimal play while maintaining the tight tolerances required for modern engine management systems and fuel injection timing accuracy.

This component is essential for engine builders and serious enthusiasts rebuilding SBC engines for performance street applications, vintage racing, or drag racing platforms. Proper thrust bearing selection prevents "crankshaft walk"—a condition where axial movement damages cam timing and valve train geometry—making this bearing critical for any engine running aggressive valve timing or high intake manifold vacuum. Installation requires careful measurement of crankshaft end play and understanding your block's specific main bearing configuration; most builders check clearance with Plastigage before final assembly. COMP CAMS' OEM-quality construction ensures compatibility with both cast-iron and aluminum blocks, supporting engine combinations ranging from 350-cubic-inch street engines to 427-cubic-inch big-block conversions.