Clevite MS-2220A Engine Crankshaft Main Bearing Set

The Clevite MS-2220A is a high-performance engine crankshaft main bearing set designed for demanding automotive applications. This precision-engineered bearing set provides superior load capacity and durability for performance and racing engines. The set features optimized bearing geometry and advanced metallurgy to maintain proper oil film thickness under extreme operating conditions.

Important Installation Notes:

• Requires thrust washer set (not included) - use with Part# TW-611S
• Upper main shells feature 180-degree oil groove for optimal connecting rod lubrication
• Lower main shells are ungrooved to maximize oil film thickness and bearing life
• Enlarged chamfers provide clearance for oversize crankshaft fillets
• High crush design ensures maximum bearing retention in the housing

Key Features:

• TriMetal bearing construction with steel back, copper-lead intermediate layer, and lead-tin-copper overlay
• Reduced overlay thickness prevents overlay fatigue and "hen tracking"
• Hardened steel backing provides exceptional strength and fretting resistance
• No flash plating for improved bearing seating and bedding-in
• Precision-manufactured to strict tolerances for consistent performance

Clevite main bearing sets utilize proven bearing groove technology. The 180-degree groove in the upper shell delivers oil to the connecting rod bearings while the ungrooved lower shell maintains maximum oil film pressure where loads are highest. This design provides the best balance of rod oiling and bearing durability for high-performance applications.

Select the appropriate Clevite bearing series (P, H, K, V, or M) based on your specific engine requirements, RPM range, and crankshaft specifications. Proper bearing selection, clearances, and installation procedures are critical for optimal performance and longevity.