What is the size of these main bearings?

These are standard size (STD) main bearings. They are designed to replace the original bearings without any machining if the crankshaft journals are still within factory specifications.

What material are these bearings made from?

The bearings are made from a bimetal construction, utilizing an aluminum silicon base. This material is chosen for its good wear characteristics and compatibility with crankshafts.

Do these bearings come with installation hardware?

This listing is for the main bearing set only. It does not include installation hardware such as main bolts or oil. Always refer to the manufacturer's installation instructions for a complete list of required components and procedures.

Specifications

Brand: King Engine Bearings
Part #: MB4018SI
UPC: 611500514876

King Engine Bearings Holden 231 (3800) V6 (Size STD) Main Bearing Set

Name: King Engine Bearings Holden 231 (3800) V6 (Size STD) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-holden-231-3800-v6-size-std-main-beari-t14-40867
Price: 56.51 USD
Availability: BackOrder

$56.51

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Fits 2004-2005 Chevrolet Impala. King Engine Bearings MB4018SI main bearing set for the 3800 V6 engine.

Key Features

Fits 2004-2005 Chevrolet Impala and 2004 Chevrolet Monte Carlo.
Standard size main bearing set for the 231 CI (3800) V6 OHV engine.
Constructed with a bimetal aluminum silicon base.
Designed as a direct fit replacement for the original equipment.

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About this part

Product Details

King Engine Bearings is well-known for making solid engine components, and this main bearing set is no exception. If you're rebuilding the bottom end of your 2004 or 2005 Chevrolet Impala with the 231 cubic inch (3800) V6 engine, these standard size main bearings are what you'll need to get the job done right.

These bearings are constructed with a bimetal aluminum silicon base. This material choice helps ensure good performance and durability for the critical rotating assembly in your engine. They are designed as a direct fit replacement, meaning they should install without modification when replacing your old, worn-out bearings.