What does '.40mm oversized' mean for these main bearings?

This means the bearings are manufactured to be 0.40mm larger in diameter than a standard, factory-new bearing. This size is used when the engine's crankshaft journals have been ground down (machined) by 0.40mm to remove wear or damage and to achieve a fresh surface.

What is the benefit of tri-metal construction?

Tri-metal bearings have three layers: a steel backing for strength, a middle layer of copper-lead alloy for load carrying, and a soft overlay of babbitt (tin-based alloy) for conformability and embeddability. This combination helps the bearing withstand high loads while conforming to the crankshaft surface for optimal oil film formation.

Do these bearings come with installation instructions?

While these bearings are a direct fit for the specified applications, it is always recommended to refer to the manufacturer's official installation guidelines or a reputable service manual for detailed procedures, torque specifications, and proper oil clearances.

ACL 1965-2000 Chevy V8 396/402/427/454 .40mm Oversized Main Bearing Set

Specifications

Brand: ACL
Part #: 5M829P-40
UPC: 9315726100110

ACL 1965-2000 Chevy V8 396/402/427/454 .40mm Oversized Main Bearing Set

Name: ACL 1965-2000 Chevy V8 396/402/427/454 .40mm Oversized Main Bearing Set
Brand: ACL
Price: 62.52 USD
Availability: InStock

$62.52

On Backorder

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

Fits 1972-1974 Excalibur Phaeton. ACL .40mm oversized main bearing set for Chevy V8 396/402/427/454 engines. Essential for rebuilding or modifying.

Key Features

Fits 1972-1974 Excalibur Phaeton.
Designed for Chevy V8 396, 402, 427, and 454 engines.
Main bearing set is .40mm oversized for use with machined crankshafts.
Tri-metal construction offers good wear resistance and conformability.
Helps maintain proper oil clearance and crankshaft support.

Secure CheckoutFast Shipping631-982-0042

Fits this vehicle

Excalibur Phaeton 1972-1974

Product Details

Already running a modified or rebuilt Chevy V8 in your Excalibur Phaeton? This ACL main bearing set is the next piece of the puzzle for ensuring proper engine health. These bearings are designed to be .40mm oversized, which is crucial when the crankshaft journals have been machined down to match. They help maintain the correct oil clearance and support the crankshaft within the engine block, which is vital for any performance or restoration build.

ACL has been making engine bearings for a long time, and this set is well-built for the demands of a V8. They use a tri-metal construction that offers good wear resistance and conformability to the crankshaft. This means they can handle the stresses of regular driving and even more spirited use, helping to protect your investment in your engine.

When you're rebuilding an engine, especially one with a larger displacement like the 396, 402, 427, or 454 Chevy V8, getting the bearing clearances right is critical. This set is specifically sized to be .40mm larger than stock, so make sure your crankshaft has been machined to this size before installation. Proper installation, including ensuring the crankshaft journals are clean and the correct oil is used, will help these bearings perform as intended.