What is the difference between main bearings and rod bearings?

Main bearings support the crankshaft within the engine block, while rod bearings connect the connecting rods to the crankshaft. Both are critical for smooth engine operation, but they handle different loads and stresses.

Do these bearings come with new seals or O-rings?

This listing is for the crankshaft main bearing set only. Seals, O-rings, and other related engine components are typically sold separately and should be replaced during an engine rebuild.

What does 'standard size' mean for these bearings?

Standard size bearings are meant for crankshafts that have not been machined or resurfaced undersize. If your crankshaft has been ground down due to wear or damage, you will need to purchase an undersize bearing set.

Specifications

Brand: ACL
Part #: 4M1822P-30

ACL Buick V6 204-231 1990-93 Engine Crankshaft Main Bearing Set

Name: ACL Buick V6 204-231 1990-93 Engine Crankshaft Main Bearing Set
Brand: ACL
SKU: acl-acl-buick-v6-204-231-1990-93-engine-crankshaft-main-bearing-set-t14-632134
Price: 12.12 USD
Availability: BackOrder

$12.12

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Fits 1992-2003 Pontiac Bonneville. ACL crankshaft main bearings for Buick V6 204-231 engines.

Key Features

Fits 1992-1995 Buick LeSabre, 1997-2004 Buick Regal, 1988-1990 Buick Riviera, 2004-2005 Chevrolet Monte Carlo, and 1992-2003 Pontiac Bonneville.
Designed for Buick V6 204-231 engines.
Specific fitment for Type L engines (1990-1993), Type 1 engines (1992-1993), and Type C engines (1991).
Standard size bearings for use with factory-spec crankshafts.
Helps reduce friction and wear between the crankshaft and engine block.

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About this part

Product Details

ACL has been making engine bearings for decades, and this crankshaft main bearing set for your 1992-2003 Pontiac Bonneville is one of their staples. These bearings are crucial for keeping your engine's crankshaft spinning smoothly within the engine block. They sit between the crankshaft and the engine block's main journals, reducing friction and wear in a high-stress environment.

This particular set is designed for Buick V6 204-231 engines, specifically for Type L engines from 1990-1993, Type 1 engines from 1992-1993, and Type C engines from 1991. Proper bearing clearance is essential for oil flow and to prevent metal-on-metal contact, which can quickly lead to catastrophic engine damage. ACL uses well-built materials to ensure these bearings can handle the heat and pressure they'll face during operation.

When you're rebuilding or repairing your engine, getting the right bearing size is critical. This set is a standard size, meaning it's intended for crankshafts that are still within their original factory specifications. If your crankshaft has been machined undersize due to wear or damage, you'll need a different bearing size. Always consult your vehicle's service manual for specific installation procedures and torque specifications.