What is the purpose of the .001 inch oversized size?

The .001 inch oversized dimension is used when the crankshaft journals have been machined down (ground) by .001 inch to clean up wear or damage. This ensures the correct bearing clearance is maintained with the machined crankshaft.

What does the CT-1 coating do?

The CT-1 coating is a dry film lubricant applied to the bearing surface. It helps to reduce friction and wear, particularly during the engine's break-in period, and can offer improved performance over uncoated bearings.

Are these bearings suitable for a performance build?

Yes, ACL is a well-known brand for engine bearings, and the CT-1 coating offers an advantage for both standard rebuilds and performance applications by aiding in lubrication and reducing wear.

Questions? Call Us:631-982-0042

M-F 8AM-4PM ET

Trusted Since 1957

Est. 1957

ACL Chevy 265/283/302/327 .001 Oversized Main Bearing Set - CT-1 Coated

Specifications

Brand: ACL
Part #: 5M429HC-01
UPC: 9315726463925

ACL Chevy 265/283/302/327 .001 Oversized Main Bearing Set - CT-1 Coated

Name: ACL Chevy 265/283/302/327 .001 Oversized Main Bearing Set - CT-1 Coated
Brand: ACL
Price: 162.05 USD
Availability: InStock

$162.05

On Backorder

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

Key Features

Fits 61+ vehicle make/model combinations, including many classic Chevrolet and GMC V8 engines.
Main bearing set is .001 inch oversized for crankshaft journals.
Features ACL's CT-1 dry film lubricant coating to reduce friction and wear.
Designed for Chevrolet 265, 283, 302, and 327 cubic inch V8 engines.
Well-built components for reliable engine performance.

Secure CheckoutFast Shipping631-982-0042

Will this fit your vehicle?

Product Details

When you're rebuilding or refreshing a classic Chevy V8, getting the crankshaft supported correctly is key. These ACL main bearings are built for engines like the 265, 283, 302, and 327 cubic inch small blocks. They're .001 inch larger than stock, which is helpful if your crankshaft journals have been ground down slightly during a previous rebuild or to clean up minor wear. The CT-1 coating is a dry film lubricant that helps reduce friction and wear, especially during the critical break-in period.

This set fits a wide range of Chevrolet and GMC vehicles from the late 1950s through the late 1960s. Make sure to check the fitment list to see if your specific truck or car is covered. Proper bearing clearance is crucial for oil pressure and engine longevity, so using a well-built set like this from ACL is a solid choice for your build.