What does 'undersize 0.020 inch' mean for these bearings?

This means the bearings are manufactured to be 0.020 inches smaller in diameter than a standard (or 'full size') bearing. They are intended for use when the engine's crankshaft journals have been machined down by 0.020 inches during an engine rebuild to correct wear or damage.

What specific V6 engines does this bearing set fit?

This set is made for Ford V6 engines displacing 3.8L (232ci) and 4.2L (256ci). It covers OHV models from 1982 onwards, including VIN 2, 3, 4, C, and R Supercharged variants.

Are these bearings suitable for a stock engine rebuild?

These bearings are undersize by 0.020 inches, so they are not for a standard rebuild unless the crankshaft has been professionally machined to this specific size. If your crankshaft is still at factory specifications, you would need a standard size bearing set.

Specifications

Brand: ACL
Part #: 4M7295A-.50

ACL Ford Prod. V6 232 - 256 1982-on Engine Crankshaft Main Bearing Set

Name: ACL Ford Prod. V6 232 - 256 1982-on Engine Crankshaft Main Bearing Set
Brand: ACL
SKU: acl-acl-ford-prod-v6-232-256-1982-on-engine-crankshaft-main-bearing-set-t14-630709
Price: 28.17 USD
Availability: BackOrder

$28.17

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Fits 1982-1997 Ford Thunderbird. ACL V6 crankshaft main bearing set for 3.8L engines. Undersize 0.020 inch.

Key Features

Fits 1982-1997 Ford Thunderbird, 1994-2004 Ford Mustang, 1995-2003 Ford Windstar, and 1987-1997 Mercury Cougar.
Designed for Ford V6 3.8L (232ci) and 4.2L (256ci) engines.
This is a 0.020 inch undersize main bearing set, intended for use with a machined crankshaft.
Supports the crankshaft within the engine block, crucial for engine operation.
Manufactured by ACL, a well-known name in engine components.

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About this part

Product Details

Already running a rebuilt or performance V6 engine in your 1982-1997 Ford Thunderbird? This ACL crankshaft main bearing set is the next piece of the puzzle. These bearings are crucial for supporting the rotating crankshaft within the engine block, ensuring smooth operation and proper oil clearance. This set is specifically designed for Ford 3.8L (232ci) and 4.2L (256ci) V6 engines, including VIN 2, 3, 4, C, and R Supercharged models from 1982 onwards.

This particular set is undersize by 0.020 inches, meaning it's intended for use when the crankshaft journals have been machined down to match this size during an engine rebuild. ACL is known for well-built engine bearings, and this set is no exception. They are manufactured to meet the specific tolerances required for reliable engine performance, helping to maintain proper oil pressure and reduce friction.

When rebuilding or refreshing your Ford V6 engine, using the correct size and quality bearings is essential for longevity. Make sure to verify your crankshaft journal size before ordering to ensure this 0.020 inch undersize set is the right fit for your build.