What does it mean that these bearings are 0.75mm undersize?

Undersize bearings are used when the crankshaft journals have been machined down, typically during an engine rebuild. This 0.75mm undersize set is meant to be used with a crankshaft that has had material removed to match this specific dimension, restoring the correct oil clearance.

What is the main function of crankshaft main bearings?

Crankshaft main bearings support the crankshaft within the engine block. They create a precise gap that allows oil to lubricate the spinning crankshaft, reducing friction and wear, and ensuring smooth engine operation.

Do I need any special tools to install these bearings?

Installation of main bearings typically requires specialized tools for crankshaft removal and installation, as well as precise measurement tools like a micrometer and plastigage to verify bearing clearance. Always refer to the manufacturer's service manual for detailed instructions and required tools.

Specifications

Brand: ACL
Part #: 4M7172A-.75

ACL Chrysler Prod. V6 167 (2.7L) 1998-05 Engine Crankshaft Main Bearing Set

Name: ACL Chrysler Prod. V6 167 (2.7L) 1998-05 Engine Crankshaft Main Bearing Set
Brand: ACL
SKU: acl-acl-chrysler-prod-v6-167-2-7l-1998-05-engine-crankshaft-main-bearing-set-t14-631174
Price: 15.94 USD
Availability: BackOrder

$15.94

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1998-2004 Chrysler Concorde crankshaft main bearings by ACL. This set is 0.75mm undersize to help restore proper oil clearance.

Key Features

Fits 1998-2004 Chrysler Concorde, 2002-2008 Chrysler Sebring, 2008 Dodge Avenger, 2006-2008 Dodge Charger, and 1998-2004 Dodge Intrepid.
Designed for Chrysler 2.7L V6 engines.
This is a set of crankshaft main bearings.
Bearings are 0.75mm undersize, suitable for use with a crankshaft that has been machined to this size.
Helps maintain proper oil clearance for the crankshaft.

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About this part

Product Details

This is a set of crankshaft main bearings from ACL, designed to fit your 1998-2004 Chrysler Concorde with the 2.7L V6 engine. These bearings are crucial for keeping your crankshaft spinning smoothly within the engine block, and they help maintain the correct oil clearance. This particular set is 0.75mm undersize, which is useful if your crankshaft journals have been machined down during an engine rebuild to correct wear or damage. Proper bearing clearance is essential for oil flow and preventing metal-on-metal contact, which can lead to serious engine damage.

When you're rebuilding an engine, getting the bearing clearances right is key. These ACL bearings are a well-built option to help you achieve that. Make sure to consult your vehicle's service manual for the correct installation procedures and torque specifications.