What does '1.00mm undersize' mean for these bearings?

This means the bearings are manufactured to be 1.00mm smaller in diameter than standard size. They are used when the engine's crankshaft journals have been ground down by 1.00mm to remove wear or damage and prepare them for new bearings.

What V6 engines does this bearing set fit?

This set is designed for the 2.8L, 3.1L, and 3.4L V6 engines found in various Chevrolet, Buick, Oldsmobile, and Pontiac vehicles. It covers VIN codes 7, W, X, Z, D, J, M, and T.

Do I need to replace all the main bearings?

Yes, it is standard practice to replace all main bearings at the same time when rebuilding or repairing an engine. This ensures consistent oil clearance and proper crankshaft support across the entire assembly.

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

Specifications

Brand: ACL
Part #: 4M2037A-1.00

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-t14-631349
Price: 23.94 USD
Availability: BackOrder

$23.94

On Backorder

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

Key Features

Fits 1985-1989 Chevrolet Celebrity, 1995-1999 Chevrolet Lumina, and 2000-2005 Chevrolet Monte Carlo.
Designed for Chevrolet, Buick, Oldsmobile, and Pontiac 2.8L, 3.1L, and 3.4L V6 engines.
This is a 1.00mm undersize main bearing set, intended for use with a machined crankshaft.
ACL is a well-known manufacturer of engine bearings.

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Fits these vehicles

Chevrolet Celebrity 1985-1989
Chevrolet Lumina 1995-1999
Chevrolet Monte Carlo 2000-2005

Product Details

When your engine’s crankshaft main bearings are worn, you’ll notice increased engine noise, especially at idle, and potentially a drop in oil pressure. These ACL main bearings are built to replace your original equipment, helping to restore proper oil clearance and support for your crankshaft. They are designed to fit your Chevrolet Celebrity, Lumina, or Monte Carlo with the 2.8L, 3.1L, or 3.4L V6 engine, ensuring a direct fit for a smooth installation.

This set is specifically sized at 1.00mm undersize, meaning it's intended for crankshafts that have been machined down by 1.00mm due to wear or damage. Always confirm your crankshaft journal size before ordering replacement bearings.