King Engine Bearings MB 770AM0.5 AM-Series Main Bearing Set 0.5mm Oversize

The King Engine Bearings MB 770AM0.5 is an AM-Series crankshaft main bearing set designed as an OE replacement for BMW M30-family inline-six engines. This set includes 7 pairs of main bearings and is sized at 0.5mm oversize, making it the correct choice when the crankshaft has been reground to the corresponding undersize specification.

Key Features:

• AM-Series Bi-Metal Construction: Aluminum-based material (K-783) equivalent to SAE-783 — engineered for low and medium load street and marine applications
• Superior Embeddability: High macro-particle embeddability helps protect crankshaft journals by absorbing debris rather than allowing it to scratch bearing surfaces
• 0.5mm Oversize: Bearings are 0.5mm thicker than standard — intended for use with a crankshaft ground to the matching 0.5mm undersize specification
• Complete Set: Includes all 7 pairs of main bearings required for a full engine rebuild
• OE Replacement Quality: Manufactured to strict tolerances for proper oil clearance and reliable crankshaft support

Material: Bi-metal aluminum alloy (Aluminum, Tin, Copper-Plus on high-strength steel backing)

Cross-Reference Part Numbers: MB770AM, MB 770AM, ACL 7M1489, Clevite MS-1142AL, Glyco 71-3419/6, Federal-Mogul 7029M, KS 87434600, NPR 60-0704-00

King Engine Bearings has been a specialist bearing manufacturer since 1960, producing precision engine bearings for automotive, marine, and industrial applications. Every bearing is manufactured under one roof to ensure consistent quality and dimensional accuracy.