What does the +0.50mm sizing mean for these bearings?

The +0.50mm sizing indicates that these bearings are intended for use with a crankshaft that has been machined down by 0.50mm. This is a common practice during engine rebuilds to restore proper clearances after wear or to achieve specific tolerances.

What is the advantage of the bimetal aluminum silicon base construction?

The bimetal construction with an aluminum silicon base offers a good combination of wear resistance and the ability to conform to the crankshaft surface. This helps maintain a consistent oil film and protect the crankshaft from damage under load.

Are these bearings suitable for a stock engine rebuild?

These bearings are suitable for an engine rebuild where the crankshaft has been machined to a +0.50mm undersize. If your crankshaft is still at standard size, you would need a standard size bearing set.

Specifications

Brand: King Engine Bearings
Part #: MB5590SI0.5
UPC: 611500424496

King Engine Bearings General Motors L40/Ld2/Lf0 2.3L (Size +0.50mm) Main Bearing Set

Name: King Engine Bearings General Motors L40/Ld2/Lf0 2.3L (Size +0.50mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-general-motors-l40-ld2-lf0-2-3l-size-0-t14-770873
Price: 62.36 USD
Availability: BackOrder

$62.36

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King Engine Bearings Main Bearing Set MB5590SI0.5 for GM L40, LD2, LF0 2.3L engines. Features bimetal aluminum silicon base.

Key Features

Fits General Motors L40, LD2, LF0 2.3L engines.
Main bearing set is sized +0.50mm for machined crankshafts.
Constructed with a bimetal aluminum silicon base for durability.
Designed to fit a variety of vehicles including Buick Skylark, Chevrolet Cavalier, and Pontiac Grand Am.

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About this part

Product Details

This is a King Engine Bearings Main Bearing Set, part number MB5590SI0.5. You get a set of main bearings designed for General Motors L40, LD2, and LF0 2.3L engines. These bearings are built with a bimetal construction, featuring an aluminum silicon base, which is a common material for good wear resistance and load-carrying capacity in engine components.

This set is specifically sized at +0.50mm, meaning it's intended for crankshafts that have been machined down by 0.50mm. This is a typical size used when rebuilding an engine to account for wear or to achieve proper clearances after machining. The aluminum silicon base offers a good balance of strength and conformability, helping to maintain oil film and protect the crankshaft during operation.

This main bearing set fits a range of vehicles, including models like the Buick Skylark, Chevrolet Cavalier, and Pontiac Grand Am. Always check the full fitment guide to confirm compatibility with your specific vehicle and engine build.