What does '0.50mm undersize' mean for these bearings?

This means the bearings are slightly smaller than the original factory size. They are designed to be used when the engine's crankshaft has been machined down by 0.50mm to account for wear. This ensures the correct oil clearance is re-established.

What engine sizes do these bearings fit?

These bearings are made for Chevrolet V6 engines with displacements of 2.8L, 3.1L, and 3.4L. They are compatible with engines identified by VIN codes 7, W, X, Z, D, J, M, or T.

Do I need any special tools to install these bearings?

Installing main bearings typically requires engine disassembly and specialized tools for measuring crankshaft journals and ensuring proper torque. Always refer to the manufacturer's service manual for the correct installation procedures and tool requirements.

Specifications

Brand: ACL
Part #: 4M2037A-.50

ACL Chevrolet V6 173-191-207 1985-04 Engine Crankshaft Main Bearing Set

Name: ACL Chevrolet V6 173-191-207 1985-04 Engine Crankshaft Main Bearing Set
Brand: ACL
SKU: acl-acl-chevrolet-v6-173-191-207-1985-04-engine-crankshaft-main-bearing-set-t14-630716
Price: 28.28 USD
Availability: BackOrder

$28.28

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Key Features

Fits 1985-1989 Chevrolet Celebrity, 1995-1999 Chevrolet Lumina, and 2000-2005 Chevrolet Monte Carlo.
Designed for Chevrolet 2.8L, 3.1L, and 3.4L V6 engines.
Main bearing set is 0.50mm undersize, intended for use with a machined crankshaft.
Helps restore proper oil clearance and reduce engine friction.
Well-built by ACL, a manufacturer with a long history in engine bearings.

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About this part

Product Details

ACL has been making engine bearings for a long time, and this set is made to meet the needs of your 2.8L, 3.1L, or 3.4L V6. They're designed to fit right into the factory locations on your Chevrolet Celebrity, Lumina, or Monte Carlo. Proper bearing clearance is crucial for maintaining oil pressure and reducing friction, which is why using a well-built replacement like this is important for the health of your engine. If you're rebuilding your engine or replacing worn bearings, this set is a solid option to get your V6 back in shape.