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

The +0.75mm sizing indicates that these bearings are intended for a crankshaft that has been machined down by 0.75mm. This is common during engine rebuilds when the crankshaft journals have been worn or damaged and need to be re-machined to a standard undersize.

What is the construction of these main bearings?

These main bearings feature a bimetal construction with an aluminum base. This design is chosen for its good wear resistance and ability to handle the loads placed on the crankshaft.

Are these bearings a direct replacement for all Mitsubishi 4G12 engines?

These bearings are specifically noted as an optional replacement for MB521AM, particularly when the flange is standard size. Always confirm your specific engine's requirements and the condition of your crankshaft journals before ordering.

Specifications

Brand: King Engine Bearings
Part #: MB5237AM0.75
UPC: 611500242533

King Engine Bearings Mitsubishi 4G12 (Size +0.75mm) Main Bearing Set

Name: King Engine Bearings Mitsubishi 4G12 (Size +0.75mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-mitsubishi-4g12-size-0-75mm-main-beari-t14-770582
Price: 52.48 USD
Availability: BackOrder

$52.48

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Fits Mitsubishi 4G12 engines. King Engine Bearings main bearing set, size +0.75mm. Essential for engine rebuilds.

Key Features

Fits Dodge Colt, Eagle Summit, Hyundai Excel, Hyundai Scoupe, Mitsubishi Mirage, Mitsubishi Precis, Plymouth Champ, and Plymouth Colt.
Main bearing set for Mitsubishi 4G12 engines.
Sized +0.75mm for use with a machined crankshaft.
Features a bimetal construction with an aluminum base.
Designed as an optional replacement for MB521AM (flange STD).

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About this part

Product Details

If you're rebuilding the engine in your Dodge Colt, Mitsubishi Mirage, or another compatible vehicle, you'll need a solid set of main bearings. These main bearings from King Engine Bearings are built for the Mitsubishi 4G12 engine and are sized +0.75mm, meaning they are meant for a crankshaft that has been machined down by 0.75mm. Proper main bearings are crucial for supporting the crankshaft and ensuring it spins smoothly within the engine block. Without them, you'd have excessive play and potential damage.

King Engine Bearings uses a bimetal construction with an aluminum base for these bearings. This type of material is well-suited for the demands of an engine's rotating assembly, offering good wear characteristics and load-carrying capacity. This set is designed as an optional replacement for MB521AM, specifically for applications where the flange is standard size. When you're putting an engine back together, using well-built components like these bearings helps ensure a reliable rebuild.