What does the +0.75mm sizing mean for these main bearings?

The +0.75mm sizing indicates that these bearings are intended for a crankshaft that has been machined down by 0.75mm. This is a common practice during engine rebuilds to correct wear or damage on the crankshaft journals.

What is the construction of these main bearings?

These main bearings are made with a bimetal construction, utilizing an aluminum base. This design helps with heat management and provides a durable surface for the crankshaft to rotate against.

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 to replace the set in your compatible Isuzu engine.

King Engine Bearings Isuzu 4Xe1/4Xf1/4Xc1T (Size +0.75mm) Main Bearing Set

Specifications

Brand: King Engine Bearings
Part #: MB5128AM0.75
UPC: 611500190438

King Engine Bearings Isuzu 4Xe1/4Xf1/4Xc1T (Size +0.75mm) Main Bearing Set

Name: King Engine Bearings Isuzu 4Xe1/4Xf1/4Xc1T (Size +0.75mm) Main Bearing Set
Brand: King Engine Bearings
Price: 50.12 USD
Availability: InStock

$50.12

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Fits 1990-1993 Geo Storm. King Engine Bearings main bearing set for Isuzu 4Xe1/4Xf1/4Xc1T engines, sized +0.75mm.

Key Features

Fits 1990-1993 Geo Storm, 1988 Chevrolet Nova, 1991-1992 Isuzu Impulse, 1991-1993 Isuzu Stylus, and 1990-1992 Lotus Elan.
Designed for Isuzu 4Xe1, 4Xf1, and 4Xc1T engines.
Main bearing set is sized +0.75mm, intended for use with a machined crankshaft.
Constructed with a bimetal design featuring an aluminum base.
Supports the crankshaft within the engine block during operation.

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Will this fit your vehicle?

Product Details

If you're rebuilding the bottom end of your 1990-1993 Geo Storm, or any Isuzu with the 4Xe1, 4Xf1, or 4Xc1T engine, a fresh set of main bearings is essential. These bearings sit between your crankshaft and the engine block, supporting the rotating assembly and ensuring smooth operation. This set is specifically sized at +0.75mm, meaning it's intended for crankshafts that have been machined down by that amount to correct wear or runout.

King Engine Bearings uses a bimetal construction with an aluminum base for these main bearings. This material choice helps manage heat and provides a solid surface for the crankshaft to ride on. Because these are a +0.75mm undersize, they are designed to be used when the crankshaft journals have been ground down by that specific amount during an engine rebuild. Proper installation is key to their performance, so always refer to your engine's service manual for correct torque specifications and assembly procedures.