What does '.010 Oversized' mean for these main bearings?

This means the bearings are manufactured to be 0.010 inches larger in diameter than standard size. They are intended for use when the engine's crankshaft journals have been machined down by 0.010 inches to remove wear or imperfections.

What is the benefit of the CT-1 coating on these bearings?

The CT-1 coating is designed to reduce friction and wear, particularly during the critical engine break-in period. It helps maintain a protective oil film, which can be especially important when the engine is first started after a rebuild.

Do these bearings come with installation instructions?

While these bearings are designed as direct replacements, it is always recommended to consult your vehicle's specific service manual for detailed installation procedures, torque specifications, and break-in recommendations.

ACL Chevy 265/283/302/327 .010 Oversized Main Bearing Set - CT-1 Coated

Specifications

Brand: ACL
Part #: 5M429HC-10
UPC: 9315726457801

ACL Chevy 265/283/302/327 .010 Oversized Main Bearing Set - CT-1 Coated

Name: ACL Chevy 265/283/302/327 .010 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.

ACL Chevy 265/283/302/327 .010 Oversized Main Bearing Set with CT-1 Coating.

Key Features

Fits 61+ vehicle make/model combinations including Chevrolet Bel Air, Impala, Chevelle, Corvette, and GMC trucks.
Main bearing set is .010 inch oversized for use with a machined crankshaft.
Features ACL's CT-1 coating to help reduce friction and wear during engine break-in.
Designed for classic Chevrolet V8 engines like the 265, 283, 302, and 327 cubic inch displacements.
Well-built components from ACL, a popular name in engine bearings.

Secure CheckoutFast Shipping631-982-0042

Will this fit your vehicle?

Product Details

Rebuilding the bottom end of your classic Chevy V8, like a 265, 283, 302, or 327, means paying close attention to the crankshaft and main bearings. These ACL main bearings are built to precise specifications and are .010 inch oversized, meaning they're designed to fit a crankshaft that has been machined down by ten-thousandths of an inch. This is a common step when cleaning up a worn crankshaft during an engine rebuild to ensure a fresh, tight fit.

What sets these bearings apart is the CT-1 coating. This advanced coating helps reduce friction and wear, especially during the critical break-in period when oil film can be inconsistent. It's a well-built component that aims to improve the longevity of your engine by providing a smoother running surface for the crankshaft. ACL has been making engine bearings for a long time, and this set is a solid option for anyone looking to get their classic V8 back in shape.

This set includes main bearings for a wide range of classic Chevrolet and GMC V8 engines from the mid-50s through the late 60s. Make sure to verify your specific engine displacement and year range to confirm fitment. Always refer to your engine's service manual for proper installation procedures and torque specifications.