What is the purpose of crankshaft main bearings?

Crankshaft main bearings support the crankshaft within the engine block. They create a low-friction surface that allows the crankshaft to rotate smoothly while maintaining proper oil clearance.

What does the .001 size designation mean for these bearings?

The .001 size indicates that these bearings are slightly smaller than standard size. This is often used when a crankshaft has been machined undersize to achieve the correct running clearance.

Are these bearings suitable for high-performance or racing engines?

These bearings are described as ideal for medium-load engines. For high-performance or racing applications, it's always best to consult the manufacturer's specific recommendations for your engine build.

Specifications

Brand: King Engine Bearings
Part #: MB509SI001
UPC: 611500429347

King Engine Bearings Chevrolet 400 Crankshaft Main Bearing Set (Set of 5) - Size .001

Name: King Engine Bearings Chevrolet 400 Crankshaft Main Bearing Set (Set of 5) - Size .001
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-chevrolet-400-crankshaft-main-bearing--t14-941327
Price: 53.25 USD
Availability: BackOrder

$53.25

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King Engine Bearings Chevrolet 400 Crankshaft Main Bearing Set (Set of 5) - Size .001. Lead-free composite bearings for medium-load engines.

Key Features

Fits 64+ vehicle make/model combinations.
Set includes 5 crankshaft main bearings.
Bearing size is .001 inch undersize.
Constructed with a bi-metal aluminum material.
Features a lead-free, environmentally safe composite.
Ideal for medium-load engines.

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About this part

Product Details

King Engine Bearings has been specializing in engine bearings since 1960, aiming to provide the highest quality available. This crankshaft main bearing set, part number MB509SI001, is designed for Chevrolet 400 engines and is sized at .001 inch. It's a set of five bearings, essential for rebuilding or replacing the main bearings on a variety of vehicles.

These bearings are constructed with a bi-metal aluminum material and feature a lead-free, environmentally safe composite. This design is particularly well-suited for medium-load engines, offering a solid option for many builds. The .001 inch sizing is important to note for proper clearance during installation, ensuring the crankshaft spins freely within the block.

This bearing set fits a wide range of vehicles, including popular models like the Chevrolet C10, Chevrolet Impala, and GMC Jimmy. Always refer to the manufacturer's installation instructions for precise fitting and torque specifications.