What size crankshaft do these bearings fit?

This is a standard size main bearing set. It is designed for use when the crankshaft journals are within their original factory specifications. If your crankshaft has been machined undersize, you will need a different size bearing set.

What is the purpose of main bearings?

Main bearings are critical components that sit between the crankshaft and the engine block. They support the rotating crankshaft, allowing it to spin freely while maintaining precise oil clearance for lubrication and to prevent metal-on-metal contact.

Does this bearing set come with installation instructions?

While this set includes the necessary bearings for a standard rebuild, it's always recommended to refer to the specific service manual for your vehicle's year and model. Proper installation, including cleaning, oil application, and torque specifications, is crucial for engine performance and longevity.

ACL Engine Crankshaft Main Bearing Set 5M429A-STD

Name: ACL Chevrolet V8 265-283-302-327 1955-67 Engine Crankshaft Main Bearing Set
Brand: ACL
SKU: acl-acl-chevrolet-v8-265-283-302-327-1955-67-engine-crankshaft-main-bearing-set-t14-632420
Price: 32.00 USD
Availability: BackOrder

ACL Chevrolet V8 265-283-302-327 1955-67 Engine Crankshaft Main Bearing Set

$32.00

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

ACL Chevrolet V8 265-283-302-327 1955-67 Engine Crankshaft Main Bearing Set. Direct fit for classic V8s.

Key Features

Fits 1955-1967 Chevrolet V8 engines (265-283-302-327).
Standard size bearings for use with factory-spec crankshaft journals.
Well-built overlay material offers good wear resistance.
Designed to maintain proper oil clearance for engine longevity.
Supports the crankshaft within the engine block.

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Will this fit your vehicle?

Product Details

Already running a classic Chevy V8? This main bearing set is a crucial piece for keeping that engine running smoothly. ACL has been making engine bearings for a long time, and this set is built to handle the demands of those older, larger displacement V8s from 1955 through 1967. These bearings sit between the crankshaft and the engine block, supporting the rotating assembly and ensuring proper oil clearance.

This particular set is a standard size, meaning it's meant to be used when the crankshaft journals are still within their original factory specifications. If your crankshaft has been machined undersize due to wear or previous rebuilds, you'd need a different size bearing. ACL uses a well-built overlay material that's designed to provide good wear resistance and conformability to the crankshaft journals. Proper oil clearance is key for longevity, and these bearings are made to meet those specifications.

When you're rebuilding or refreshing an engine from this era, using a reputable bearing brand like ACL is a solid choice. Make sure to check your crankshaft journals for size and condition before ordering, and always follow the manufacturer's recommended installation procedures and torque specifications.