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

This means the bearings are manufactured to be slightly larger than the standard size. They are intended for use when the crankshaft journals have been machined down by 0.010 inches due to wear or to clean up the surface. This ensures a proper fit and oil clearance on a reconditioned crankshaft.

What is the CT-1 coating on these bearings?

The CT-1 coating is a special surface treatment applied to the bearings. It helps to reduce friction during the critical initial engine break-in period and can also improve oil film retention, which is important for bearing longevity.

Do these bearings come with installation instructions?

While this set includes the necessary main bearings, it does not come with specific installation instructions. It is highly recommended to consult your vehicle's factory service manual or a professional mechanic for proper installation procedures, including torque specifications.

Specifications

Brand: ACL
Part #: 5M590HC-10
UPC: 9315726457900

ACL Ford 221/255/260/289/302 Windsor 5.0L .010 Oversized Size Main Bearing Set - CT-1 Coated

Name: ACL Ford 221/255/260/289/302 Windsor 5.0L .010 Oversized Size Main Bearing Set - CT-1 Coated
Brand: ACL
SKU: acl-acl-ford-221-255-260-289-302-windsor-5-0l-010-oversized-size-main-bearing-se-t14-372715
Price: 151.97 USD
Availability: BackOrder

$151.97

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ACL Ford 221/255/260/289/302 Windsor 5.0L .010 Oversize Size Main Bearing Set - CT-1 Coated

Key Features

Fits 34+ vehicle make/model combinations including AC Shelby Cobra, Ford Bronco, Fairlane, Falcon, Mustang, Galaxie, Mercury Comet, Cougar, and more.
Main bearing set is .010 inch oversized for use with crankshafts machined to a .010 inch undersize.
Features ACL's CT-1 coating for improved break-in and oil retention.
Designed for Ford 221, 255, 260, 289, and 302 Windsor 5.0L engines.
Well-built to support crankshafts and maintain oil pressure during engine operation.

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About this part

Product Details

When you're rebuilding a Ford 221, 255, 260, 289, or 302 Windsor 5.0L engine, getting the main bearings right is crucial for proper oil pressure and crankshaft support. This set from ACL is built to precise specifications and comes .010 inch oversized, meaning it's designed to fit crankshafts that have been machined down by that amount during a rebuild. The CT-1 coating on these bearings helps with initial break-in and can improve oil retention.

ACL has been making engine bearings for a long time, and this set reflects that experience. They're well-built to handle the stresses of a running engine. Because these are oversized, they're intended for engines where the main journals on the crankshaft have been ground down to a .010 inch undersize. This is a common practice during engine overhauls to clean up wear or damage and restore proper clearances. Make sure to check your crankshaft measurements before ordering to ensure this .010 undersize bearing set is the correct fit for your specific rebuild.

This set includes all the main bearings you'll need for your engine. Always refer to your vehicle's specific service manual for detailed installation procedures and torque specifications to ensure a successful rebuild.