What is the main function of crankshaft main bearings?

Crankshaft main bearings support the crankshaft within the engine block. They create a low-friction surface for the crankshaft journals to rotate on, while also maintaining precise oil clearance to ensure proper lubrication and prevent excessive wear.

What does 'tri-metal construction' mean for these bearings?

Tri-metal construction refers to a bearing made of three distinct layers. Typically, this includes a strong steel backing for structural integrity, a copper-lead alloy layer for excellent heat dissipation and load capacity, and a soft babbitt overlay on the surface for conformability and embeddability, which helps protect the crankshaft.

Do I need to replace anything else when installing main bearings?

When replacing main bearings, it's highly recommended to also replace the connecting rod bearings and thrust bearings. Ensuring all bearing surfaces are new and properly lubricated is crucial for a successful engine rebuild and longevity.

ACL Chrysler Prod. 6 225 1976-87 Engine Crankshaft Main Bearing Set

Specifications

Brand: ACL
Part #: 4M1419AL-40

ACL Chrysler Prod. 6 225 1976-87 Engine Crankshaft Main Bearing Set

Name: ACL Chrysler Prod. 6 225 1976-87 Engine Crankshaft Main Bearing Set
Brand: ACL
SKU: acl-acl-chrysler-prod-6-225-1976-87-engine-crankshaft-main-bearing-set-t14-633106
Price: 25.96 USD
Availability: BackOrder

$25.96

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ACL Chrysler Prod. 6 225 1976-87 Engine Crankshaft Main Bearing Set. Direct fit for many Chrysler, Dodge, and Plymouth models.

Key Features

Fits Chrysler LeBaron, Dodge Aspen, Dodge Charger, Dodge D150, Dodge Dart, and Plymouth Volare.
Designed for Chrysler Prod. 6 225 engines from 1976-1987.
Tri-metal construction with steel backing, copper-lead alloy, and babbitt overlay.
High tensile strength for durability under load.
Helps ensure smooth crankshaft rotation and proper oil clearance.

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Will this fit your vehicle?

Product Details

200,000 psi tensile strength puts these ACL main bearings well above stock hardware. When you're rebuilding or refreshing the bottom end of your Chrysler Slant Six engine, the crankshaft main bearings are critical. They create the smooth, low-friction surface that the crankshaft journals ride on, and they need to handle significant loads. ACL has been making bearings for a long time, and their Race Series bearings are a popular choice for builds that need something more robust than standard replacement parts.

These bearings are made with a tri-metal construction, which means they have a steel backing for strength, a copper-lead alloy in the middle for load carrying, and a thin overlay of babbitt on the surface for excellent conformability and embeddability. This combination helps them handle the stresses of performance applications while still providing a smooth bearing surface. They are designed to be a direct replacement for your original bearings, so installation should be straightforward as part of a complete engine rebuild. Make sure to follow proper torque specifications and use assembly lube when installing these bearings.

This set includes the main bearings for your engine. If you're doing a full rebuild, you'll also want to consider the connecting rod bearings and thrust bearings to ensure everything is fresh and properly aligned.