Clevite MS-1733P-20 Main Bearing Set Chevy 151-153 4-Cylinder P-Series

The Clevite MS-1733P-20 is a high-performance main bearing set designed specifically for Chevrolet 151-153 cubic inch 4-cylinder engines. This P-Series bearing set features full groove design in the upper shells to maximize oil flow to connecting rod bearings, making it ideal for performance applications where increased lubrication is critical.

P-Series Performance Features:

• Full grooved upper main shells provide maximum oil delivery to rod bearings
• High crush design ensures superior retention in the bearing saddle
• Reduced overlay thickness prevents overlay fatigue and "hen tracking"
• Hardened steel backing provides added strength and fretting resistance
• Greater eccentricity helps narrow bearing contact patterns for optimal load distribution
• TriMetal construction with lead-tin-copper overlay for excellent durability

Application Notes:

P-Series bearings are engineered for high-performance and racing engines that demand maximum oil flow to prevent rod bearing starvation. The full groove design in these main bearings prioritizes connecting rod lubrication, which is essential in high-RPM applications. These bearings are recommended when bearing analysis shows signs of oil starvation such as polishing, smearing, or discoloration concentrated at the bearing center.

Technical Specifications:

• Application: Chevrolet 151-153 CI 4-cylinder engines
• Bearing Size: 0.020" undersize
• Series: P-Series (High Performance)
• Construction: TriMetal with hardened steel back
• Groove Configuration: Full grooved upper shells for maximum oiling

This bearing set is ideal for engine builders and racers who need proven performance bearing technology with emphasis on connecting rod lubrication. The P-Series design has been used successfully in competition engines for decades and represents Clevite's original high-performance bearing specification.