King Engine Bearings MB5559AM0.5 Main Bearing Set Oversize for Isuzu - 0.50mm 4ZB1

The King Engine Bearings MB5559AM0.5 is a precision-engineered main bearing set designed for the Isuzu 4ZB1 1.8L four-cylinder engine. This bearing set features a +0.50mm (0.020") oversize dimension, making it ideal for engine rebuilds with crankshafts that have been machined to accommodate wear or damage.

AM-Series Technology:

The King Bearings AM-Series employs standard aluminum-based bi-metal construction, the softest material in King's range, well-suited for low to medium load applications. This aluminum material is equivalent to SAE-783 specification and provides excellent performance for street and marine engines.

Key Features:

• Bi-metal aluminum construction with lead-free formulation
• Precision tolerance control to within ±0.0001 inch
• Superior embeddability for reduced crank journal scratching
• +0.50mm oversize for machined crankshafts
• Compatible with OEM part numbers 8-94251-263-1X2 and 8-94319-179-0
• Environmentally friendly and user-safe lead-free design

Application:

King AM-Series main bearings are recommended for street or marine applications and provide reliable OE-replacement performance for Isuzu 4ZB1 engines found in various Isuzu vehicles including pickup trucks, Trooper, Amigo, and Impulse models from the 1980s and 1990s.

This complete main bearing set includes all bearings necessary for a full crankshaft installation. The aluminum-based material offers excellent compatibility with both steel and cast iron crankshafts while maintaining the embeddability needed to protect against dirt and debris contamination during operation.