What does '11 Oversize' mean for these main bearings?

The '11 Oversize' designation means these bearings are .011 inches thicker than standard size. This is used when the crankshaft journals have been machined down by .011 inches to remove wear or damage, ensuring a proper fit for the rebuilt engine.

Are these bearings suitable for a daily driver engine rebuild?

While these are Race Series bearings built for durability, they are primarily intended for performance or race applications where higher loads are expected. For a standard daily driver, a standard-size bearing or a different ACL series might be more appropriate, depending on the crankshaft condition.

What other parts are typically needed when replacing main bearings?

When replacing main bearings, you'll also need to consider main bearing cap bolts and possibly new oil seals. It's also crucial to have the crankshaft journals measured and cleaned, and to ensure you have the correct assembly lube for installation.

Specifications

Brand: ACL
Part #: 5M829H-11
UPC: 9315726264348

ACL Chevrolet V8 396/402/427/454 Race Series 11 Oversize Main Bearing Set

Name: ACL Chevrolet V8 396/402/427/454 Race Series 11 Oversize Main Bearing Set
Brand: ACL
SKU: acl-acl-chevrolet-v8-396-402-427-454-race-series-11-oversize-main-bearing-set-t14-4340831
Price: 118.77 USD
Availability: BackOrder

$118.77

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ACL Chevrolet V8 396/402/427/454 Race Series 11 Oversize Main Bearing Set. Essential for engine rebuilds needing precise crankshaft alignment.

Key Features

Fits many Chevrolet V8 engines including 396, 402, 427, and 454 cubic inch displacements.
Race Series bearings feature a specialized overlay material for improved durability and wear resistance.
This is an 11 thousandths of an inch (.011") oversize main bearing set.
Designed to support the crankshaft in high-performance and racing applications.
ACL is a well-known manufacturer of engine bearings.

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About this part

Product Details

Rebuilding the bottom end of your Chevrolet V8, especially those big blocks like the 396, 402, 427, or 454, means paying close attention to the crankshaft main bearings. These ACL Race Series bearings are designed to handle the demands of a performance or race engine rebuild. They are an 11 thousandths of an inch oversize set, meaning they're intended for crankshafts that have been machined down to match this specific size.

ACL has been making engine bearings for a long time, and their Race Series is built with a special overlay material that's tougher and more resistant to wear than standard bearings. This is important because the main bearings are what support the crankshaft and keep it spinning smoothly under high loads. The 11 thousandths oversize is a common size for crankshafts that have been reground to clean up wear or damage, ensuring a fresh, tight fit. When you're putting an engine back together for serious use, using well-built bearings like these is a critical step for longevity and performance.

This set is for the main bearings only. Make sure to check your crankshaft journals for the correct size and condition before ordering. If your crank has been machined, you'll need to know the exact undersize to get the right bearings. Always refer to your engine's service manual for proper installation procedures and torque specifications.