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

The +0.25mm designation indicates that these bearings are slightly larger than standard size. This is typically used when the engine's crankshaft journals have been machined down by 0.25mm, or if there's a need to achieve specific oil clearances during an engine rebuild.

What is a bimetal bearing made of?

A bimetal bearing, like this one with an aluminum silicon base, uses multiple layers of different metals. This construction helps to provide a good balance of strength, wear resistance, and conformability to 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 General Motors 379 V8 OHV engine.

Specifications

Brand: King Engine Bearings
Part #: MB5257SI1.25
UPC: 611500435621

King Engine Bearings General Motors 379/V8 Ohv (Size +0.25mm) Main Bearing Set

Name: King Engine Bearings General Motors 379/V8 Ohv (Size +0.25mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-general-motors-379-v8-ohv-size-0-25mm--t14-770603
Price: 74.61 USD
Availability: BackOrder

$74.61

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King Engine Bearings main bearing set for GM 379/V8 OHV engines. Size +0.25mm.

Key Features

Fits AM General Hummer, Chevrolet Blazer, Chevrolet C10 Suburban, and many other General Motors 379 V8 OHV vehicles.
Main bearing set with a +0.25mm size for proper engine clearance.
Constructed with a bimetal aluminum silicon base for reliable performance.
Designed for General Motors 379 V8 OHV engine applications.

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About this part

Product Details

King Engine Bearings is well-known for making solid engine components, and this main bearing set is no exception. If you're rebuilding the bottom end of your General Motors 379 V8 OHV engine, these bearings are designed to handle the job. They are a bimetal type, meaning they have an aluminum silicon base, which is a common and reliable material for main bearings.

This particular set is sized at +0.25mm, which is important for ensuring proper clearances when working with an engine that has had previous machining or wear. King has been around for a while, and their bearings are a popular choice for many mechanics because they fit right and perform well. This set is designed to fit a wide range of General Motors vehicles, including models like the Chevrolet C1500, AM General Hummer, and Chevrolet Express 2500.