What does '0.030 inch undersize' mean for these bearings?

This means the bearings are made to fit a crankshaft that has been machined down by 0.030 inches. This is common during engine rebuilds when the original crankshaft journals are worn or damaged and need to be ground to a smaller size.

Why are crankshaft main bearings important?

Main bearings support the crankshaft within the engine block. They create a precise gap for oil to lubricate between the spinning crankshaft and the stationary bearing, reducing friction and wear while keeping the crankshaft properly aligned.

Does this set include all the main bearings needed for the engine?

Yes, this kit contains a full set of crankshaft main bearings required for the engine. It's designed to cover the main bearing positions for your Chevrolet V8 400.

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Trusted Since 1957

Est. 1957

Specifications

Brand: ACL
Part #: 5M1038A-30

ACL Chevrolet V8 400 1970-80 Engine Crankshaft Main Bearing Set

Name: ACL Chevrolet V8 400 1970-80 Engine Crankshaft Main Bearing Set
Brand: ACL
SKU: acl-acl-chevrolet-v8-400-1970-80-engine-crankshaft-main-bearing-set-t14-631510
Price: 31.74 USD
Availability: BackOrder

$31.74

On Backorder

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

ACL Chevrolet V8 400 1970-80 Engine Crankshaft Main Bearing Set for 1970-1971 Stutz Blackhawk.

Key Features

Fits 1970-1971 Stutz Blackhawk.
Designed for Chevrolet V8 400 engines.
This is a 0.030 inch undersize crankshaft main bearing set.
ACL is a well-known manufacturer of engine bearings.
Helps maintain proper crankshaft alignment and oil pressure.

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About this part

Product Details

You get a full set of crankshaft main bearings in this kit, which means one box handles the whole job for your engine's bottom end. These ACL bearings are built to fit your Chevrolet V8 400 engine, specifically for the 1970-1971 Stutz Blackhawk. Proper main bearings are crucial for keeping your crankshaft spinning smoothly and within its intended tolerances, directly impacting engine health and longevity.

This set is a 0.030 inch undersize bearing set, meaning it's designed for crankshafts that have been machined down by 0.030 inches during a rebuild. Using the correct undersize bearings ensures a snug, proper fit on a reground crankshaft, which is essential for maintaining oil pressure and preventing premature wear. ACL has been making engine bearings for a long time, and this set is a well-built option for anyone rebuilding their V8 400.