What does '0.030 undersize' mean for these bearings?

This means the bearings are manufactured to be 0.030 inches smaller in diameter than standard size. They are designed to be used when the crankshaft journals have been machined down by 0.030 inches to remove wear or damage. Using the correct undersize is crucial for proper oil clearance and engine oil pressure.

Are these bearings sold individually or as a set?

This is a complete set of main bearings for your V8 engine. It includes all the necessary bearings to replace the main bearings on the crankshaft.

What is the typical lifespan of engine main bearings?

The lifespan of engine main bearings depends heavily on proper installation, consistent oil changes with the correct oil type, and the overall condition of the engine. With good maintenance, they can last for many thousands of miles, but they are often replaced during a full engine rebuild or when signs of wear appear.

Specifications

Brand: ACL
Part #: 5M829A-30

ACL Chevrolet V8 396-402-427-454 1965-00 Engine Crankshaft Main Bearing Set

Name: ACL Chevrolet V8 396-402-427-454 1965-00 Engine Crankshaft Main Bearing Set
Brand: ACL
SKU: acl-acl-chevrolet-v8-396-402-427-454-1965-00-engine-crankshaft-main-bearing-set-t14-630859
Price: 34.78 USD
Availability: BackOrder

$34.78

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 V8 crankshaft main bearing set for 396-454 engines, crucial for smooth engine operation.

Key Features

Fits 1972-1974 Excalibur Phaeton.
Designed for Chevrolet V8 engines with 396, 402, 427, and 454 cubic inch displacements.
Main bearing set is 0.030 inches undersize, intended for use with a crankshaft machined to match.
Supports the crankshaft and maintains proper oil clearance within the engine block.
ACL is a well-known manufacturer of engine bearings.

Secure CheckoutFast Shipping631-982-0042

About this part

Product Details

ACL has been making engine bearings for decades, and this crankshaft main bearing set for your 1972-1974 Excalibur Phaeton is one of their staples. These bearings are critical for supporting the crankshaft within the engine block, allowing it to spin freely while handling the immense forces generated during combustion. If you're rebuilding your V8 engine, especially one of the Chevrolet 396, 402, 427, or 454 cubic inch big blocks common in these vehicles, a fresh set of main bearings is essential for proper oil pressure and long-term engine health.

This particular set is sized at 0.030 inches undersize, meaning it's intended for crankshafts that have been machined down by 0.030 inches to clean up wear or damage. Using the correct undersize bearing is vital for maintaining proper oil clearance, which directly impacts oil pressure and lubrication. ACL uses well-built materials and precise manufacturing to ensure these bearings meet the demands of a performance V8 engine, helping to keep your classic Excalibur running smoothly for years to come.

When installing these bearings, always refer to your vehicle's specific service manual for detailed instructions and torque specifications. Ensuring the crankshaft journals are clean and properly prepared, and that the correct oil is used, will help these bearings perform as intended.