What does the +0.25mm sizing mean for these bearings?

The +0.25mm sizing indicates that these bearings are designed to be used when the crankshaft journals have been machined down by 0.25mm. This is a common practice during engine rebuilds to address wear or minor damage on the crankshaft.

What is the construction of these main bearings?

These main bearings utilize a bimetal construction, which means they have a layered design. The base material is aluminum, chosen for its beneficial properties in supporting rotating components like the crankshaft.

Are these bearings sold individually or as a set?

This product is a main bearing set, meaning it includes all the necessary main bearings required for a complete installation on your Isuzu 4JB1/T engine.

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Specifications

Brand: King Engine Bearings
Part #: MB5296AM0.25
UPC: 611500402388

King Engine Bearings Isuzu 4Jb1/T (Size +0.25mm) Main Bearing Set

Name: King Engine Bearings Isuzu 4Jb1/T (Size +0.25mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-isuzu-4jb1-t-size-0-25mm-main-bearing--t14-770638
Price: 57.61 USD
Availability: BackOrder

$57.61

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King Engine Bearings Isuzu 4JB1/T Main Bearing Set. This +0.25mm set is crucial for rebuilding your engine's bottom end.

Key Features

Fits Isuzu 4JB1/T engines.
Main bearing set with a +0.25mm undersize.
Features a bimetal construction with an aluminum base.

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About this part

Product Details

This is a main bearing set from King Engine Bearings, specifically for Isuzu 4JB1/T engines. These bearings are a key part of your engine's bottom end, supporting the crankshaft as it spins. This particular set is sized at +0.25mm, meaning it's intended for use when the crankshaft journals have been machined down by 0.25mm during an engine rebuild to clean up wear or damage.

The bearings themselves are constructed with a bimetal design, featuring an aluminum base. This construction is common for main bearings as it offers good wear characteristics and thermal properties for supporting the rotating crankshaft. When you're rebuilding an engine, using bearings that are the correct size and made with reliable materials is essential for ensuring proper oil clearance and long-term engine health.