Clevite MS-2046P Engine Crankshaft Main Bearing Set

The Clevite MS-2046P is a high-performance engine crankshaft main bearing set designed for demanding automotive applications. This P-Series bearing set includes full grooved bearings to maximize oil flow to connecting rod bearings, with all sizes containing a standard length flanged thrust bearing for proper crankshaft positioning.

P-Series Performance Features:

• Full 360-degree grooving in main bearings for maximum oil delivery to connecting rods
• High crush design for superior bearing retention and prevention of bearing spin
• Reduced overlay thickness to prevent overlay fatigue (hen tracking) in high-stress applications
• Greater eccentricity to narrow bearing contact patterns and improve oil distribution
• Hardened steel backing on compatible components for added strength and fretting resistance
• Tri-Metal construction for exceptional durability under severe operating conditions

Application Guidelines:

P-Series main bearing sets are ideal for performance and racing engines where maximum oil flow to the connecting rod bearings is critical. Use these bearings when rod bearing oil starvation is evident, typically indicated by bearing surface polishing, smearing, or discoloration concentrated at the bearing's axial center. The higher eccentricity design is particularly beneficial for extremely high RPM applications where severe rod bore close-in occurs.

Technical Specifications:

The upper main shells feature oil grooves to continuously supply lubricant to the connecting rods through the crankshaft oil passages. All bearings in this set maintain standard length flanged thrust bearing configuration regardless of size selection. The full groove design ensures consistent oil delivery even under the most demanding racing conditions, though this comes with a slight reduction in load capacity compared to partial-groove designs—a worthwhile trade-off when rod bearing lubrication is the priority.

These bearings represent Clevite's oldest and most proven high-performance bearing series, trusted by engine builders for decades in competition applications ranging from drag racing to road racing.