What is the main function of crankshaft main bearings?

Crankshaft main bearings support the crankshaft within the engine block. They allow the crankshaft to rotate smoothly while maintaining precise oil clearances, which is vital for lubrication and preventing friction.

Are these bearings undersized or oversized?

This ACL 5M429A-10 bearing set is designed to be a standard size replacement. If your crankshaft has been machined (ground), you will need to order the appropriate undersize bearings.

What is the best practice for installing engine bearings?

Engine bearing installation requires extreme cleanliness. Ensure the crankshaft journals and the inside of the bearing saddles in the block are perfectly clean. Always use a quality assembly lube on the bearing surfaces and follow the manufacturer's specified torque sequence and values.

ACL Engine Crankshaft Main Bearing Set 5M429A-10

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-t14-632416
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

Key Features

Fits 1955-1967 Chevrolet V8 265-283-302-327 engines.
Direct replacement main bearing set.
Built to meet original equipment specifications.
Ensures proper crankshaft clearance and oil flow.
Essential for engine rebuilds and bottom-end work.

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Will this fit your vehicle?

Product Details

You get a full set of main bearings in this kit, which means one box handles the critical bottom-end rebuild for your classic Chevy V8. These bearings are what the crankshaft rides on inside the engine block, and having a fresh, well-built set is key to a smooth-running engine. This particular set from ACL is made for Chevrolet V8 engines displacing 265, 283, 302, and 327 cubic inches, covering models from 1955 through 1967.

ACL has been making engine bearings for a long time, and they know what it takes to get the job done right. These bearings are built to meet or exceed original equipment specifications, ensuring they'll handle the stresses of daily driving and occasional spirited use. When you're rebuilding an engine, especially one of these iconic small-blocks, using reliable components like these ACL bearings is essential for longevity and performance. They are designed to provide the correct clearances for proper oil flow, which is crucial for keeping your crankshaft and bearing surfaces cool and lubricated.

This set is designed as a direct replacement for your original main bearings. Make sure to follow the manufacturer's installation instructions and torque specifications carefully during your engine rebuild. Cleanliness is paramount when installing bearings; ensure your crankshaft and block surfaces are spotless before assembly.