What is the difference between standard and undersize bearings?

Standard (STD) bearings are meant for a crankshaft that is in good condition and has not been machined. Undersize bearings are used when the crankshaft has been ground down to remove damage or wear, requiring a thicker bearing to restore the correct clearance.

What material are these bearings made from?

These ACL bearings feature a tri-metal overlay construction. This is a common and well-regarded material for engine bearings, known for its durability and ability to maintain an oil film under pressure.

Do I need to replace these bearings if my crankshaft has been machined?

If your crankshaft has been machined undersize (e.g., to 0.010" or 0.020" undersize), you will need to purchase connecting rod bearings that match that specific undersize dimension. These are standard size bearings and are not suitable for a machined crankshaft.

Specifications

Brand: ACL
Part #: 6B2306H-STD

ACL Holden/Buick 231ci (3.8L V6) Engine Connecting Rod Bearing Set

Name: ACL Holden/Buick 231ci (3.8L V6) Engine Connecting Rod Bearing Set
Brand: ACL
SKU: acl-acl-holden-buick-231ci-3-8l-v6-engine-connecting-rod-bearing-set-t14-632569
Price: 90.89 USD
Availability: BackOrder

$90.89

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ACL Holden/Buick 3.8L V6 standard connecting rod bearing set.

Key Features

Fits many Buick, Chevrolet, Oldsmobile, Pontiac, and Holden 3.8L (231ci) V6 engines.
Standard (STD) size bearings for use with an undamaged or freshly machined crankshaft.
Tri-metal overlay construction offers good durability and oil retention.
Designed as a direct replacement for factory connecting rod bearings.
Includes all necessary connecting rod bearings for a complete engine rebuild.

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About this part

Product Details

When you're rebuilding an engine, especially one like the Holden/Buick 231ci (3.8L V6), getting the right connecting rod bearings is crucial for long-term health. These ACL bearings are built with a tri-metal overlay, a common and effective material choice for durability and proper oil film formation between the crank and rod. They are designed to be a direct replacement for your stock bearings, ensuring a proper fit during your engine build.

ACL has been making engine bearings for a long time, and their experience shows in the construction of these standard-sized bearings. The tri-metal material is well-known for its ability to handle the pressures and temperatures found in an engine, helping to prevent premature wear. Because these are standard size, they're intended for use with an undamaged crankshaft. If your crankshaft has been machined undersize, you'll need a different bearing size.

This set includes all the connecting rod bearings you'll need for your 3.8L V6. Make sure to follow the manufacturer's installation instructions and use the correct torque specifications when installing these bearings to ensure optimal performance and longevity.