What does the +1.0mm size mean for these bearings?

The +1.0mm designation indicates that these bearings are oversized by one millimeter. They are designed to be used when the crankshaft journals have been machined down by 1.0mm, typically during an engine rebuild to correct wear or damage.

What is the construction of these main bearings?

These bearings are made with a bimetal construction, featuring an aluminum base. This design helps with heat dissipation and provides a durable bearing surface for the crankshaft.

Are these bearings a direct replacement for all Isuzu 4ZB1 engines?

These bearings are a direct fit for the specified Isuzu models with the 4ZB1 engine, but only if the crankshaft has been machined to the +1.0mm size. Always confirm your crankshaft journal size before ordering.

Specifications

Brand: King Engine Bearings
Part #: MB5559AM1.0
UPC: 611500204449

King Engine Bearings Isuzu 4Zb1 (Size +1.0mm) Main Bearing Set

Name: King Engine Bearings Isuzu 4Zb1 (Size +1.0mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-isuzu-4zb1-size-1-0mm-main-bearing-set-t14-770832
Price: 50.12 USD
Availability: BackOrder

$50.12

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Fits 1986-1995 Isuzu Pickup. King Engine Bearings main bearing set, size +1.0mm. Bimetal aluminum base construction.

Key Features

Fits 1986-1995 Isuzu Pickup, 1989-1993 Amigo, 1985-1989 Impulse, and 1986-1987 Trooper with 4ZB1 engine.
Main bearing set for Isuzu 4ZB1 engines.
Size is +1.0mm, intended for use with a machined crankshaft.
Features a bimetal construction with an aluminum base.
From King Engine Bearings, a popular manufacturer of engine components.

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About this part

Product Details

This is a main bearing set from King Engine Bearings, specifically for Isuzu 4ZB1 engines. These bearings are crucial for the rotating crankshaft, providing a low-friction surface between the crank journals and the engine block. This particular set is sized at +1.0mm, meaning it's intended for use when the crankshaft journals have been machined down by 1.0mm during an engine rebuild or repair.

Constructed with a bimetal design, these bearings utilize an aluminum base. This material choice helps manage heat and offers good compatibility with crankshaft surfaces. King Engine Bearings is a well-known name in engine components, and this set is designed to fit right into the specified Isuzu models, including the Pickup, Amigo, Impulse, and Trooper, when the 4ZB1 engine is present and the crankshaft has been machined to the +1.0mm size.