King Engine Bearings MB 474AM0.5 Main Bearing Set for Mazda JE06, JE27, JE39, JE48 - +0.5mm Oversize

The King Engine Bearings MB 474AM0.5 is an oversize (+0.5mm) crankshaft main bearing set engineered as a direct OE-replacement for Mazda JE-series engines including the JE06, JE27, JE39, and JE48. Manufactured to exacting tolerances, this set is designed to restore proper crankshaft clearances during engine rebuilds where the crank journals have been machined 0.5mm undersize.

Material & Construction:

• Bi-Metal Aluminum Construction — Standard aluminum-based bearing material equivalent to SAE-783, optimized for low and medium load engine applications
• Steel-Backed Design — Aluminum alloy bonded to a precision steel backing for dimensional stability and reliable seating in the bearing bore
• Lead-free formulation for environmentally responsible engine building

King Bull's Eye Tolerance™ Technology:

• Combines highly accurate CNC machining, overplating, and computerized wall thickness monitoring
• Real-time in-process adjustments ensure each bearing meets tight dimensional specifications
• Delivers consistent crush and oil clearance critical for proper crankshaft support

Product Specifications:

• Part Number: MB 474AM0.5
• Type: Main Bearing Set
• Size: +0.5mm Oversize
• Material: Bi-Metal — Aluminum (SAE-783 equivalent)
• Application: Mazda JE06, JE27, JE39, JE48 engines

King Engine Bearings has specialized exclusively in engine bearings since 1960, supplying aftermarket, OE-replacement, and performance bearing solutions for automotive, marine, aviation, and standby power applications worldwide. The AM-Series main bearings are an ideal choice for street and standard engine rebuild applications on Mazda JE-platform engines.