What does '.040 inch undersize' mean for these rod bearings?

This means the bearings are manufactured to be slightly smaller than standard size. They are intended for use when the crankshaft journals have been machined down by 0.040 inches during an engine rebuild. This ensures a precise fit and proper oil clearance on the resized journals.

What is trimetal construction?

Trimetal bearings feature a layered construction, typically consisting of steel backing, a copper-lead alloy intermediate layer, and a thin overlay of babbitt (a soft metal alloy). This design offers a strong foundation with excellent conformability and embeddability for debris, making them well-suited for high-performance and heavy-duty engine applications.

Do these bearings come with new rod bolts?

This set includes the trimetal rod bearings only. New rod bolts are typically sold separately, and it's recommended to use new, high-strength rod bolts when rebuilding an engine, especially for performance applications.

Specifications

Brand: ACL
Part #: 8B743P-40
UPC: 9315726101902

ACL 1965-1968 Chevy V8 396/402/427/454 .40mm Oversized Trimetal Rod Bearing Set

Name: ACL 1965-1968 Chevy V8 396/402/427/454 .40mm Oversized Trimetal Rod Bearing Set
Brand: ACL
SKU: acl-acl-1965-1968-chevy-v8-396-402-427-454-40mm-oversized-trimetal-rod-bearing-s-t14-103032
Price: 59.53 USD
Availability: BackOrder

$59.53

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ACL .040 inch undersize trimetal rod bearing set for Chevy V8 396-454 engines. Essential for engine rebuilds needing precise clearance.

Key Features

Fits 1965-1968 Chevrolet V8 engines with 396, 402, 427, and 454 cubic inch displacements.
This is a .040 inch undersize bearing set, intended for use with machined crankshaft journals.
Trimetal construction offers excellent strength and wear resistance for demanding engine applications.
Designed to provide proper oil clearance for optimal engine lubrication and performance.
ACL is a well-known manufacturer of engine bearings for performance and rebuild applications.

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About this part

Product Details

Rebuilding the top end of your classic Chevy V8, maybe a 396, 402, 427, or 454? If you're looking to get those connecting rods back in spec after a rebuild or machine work, these ACL trimetal rod bearings are what you need. They're built to handle the demands of these larger displacement V8s, ensuring proper oil clearance and long-term durability for your engine.

These bearings are a .040 inch undersize set, meaning they're designed to fit crankshaft journals that have been machined down by 0.040 inches. This is a common practice during engine rebuilding to ensure a fresh, perfectly round surface for the bearings to run on. ACL uses a trimetal construction, which is a well-known standard for performance and durability in high-stress applications. This layered material helps manage heat and oil flow effectively, which is critical for keeping your engine running cool and preventing premature wear.

When you're doing an engine rebuild, getting the bearing clearances just right is crucial for oil pressure and engine longevity. This set from ACL is a solid option for anyone looking to do the job correctly. Make sure to check your crankshaft journal dimensions to confirm they've been machined to the correct undersize before ordering.