What does the .020 oversized and +.010 housing bore mean for my engine?

The .020 oversized measurement refers to the bearing itself being slightly larger than standard to compensate for crankshaft journals that have been machined down. The +.010 housing bore indicates that the engine block's main bearing bores have been machined to be +.010 inches larger than stock to accept these specific bearings.

What material are these main bearings made from?

These main bearings feature a bimetal construction with an aluminum silicon base. This material is chosen for its good heat dissipation and wear resistance characteristics, which are important for engine longevity.

Are these bearings a direct replacement for all GM LS engines?

While these bearings fit many GM LS engines, they are specifically sized at .020 inches oversized and require a +.010 inch housing bore. It's essential to verify your engine's specifications and whether it has been machined to these dimensions before purchasing.

Specifications

Brand: King Engine Bearings
Part #: MB5766SI020
UPC: 611500585876

King Engine Bearings GM LS1/2/4/6 (Housing Bore +.010) (Size .020 Oversized) Main Bearing Set

Name: King Engine Bearings GM LS1/2/4/6 (Housing Bore +.010) (Size .020 Oversized) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-gm-ls1-2-4-6-housing-bore-010-size-020-t14-45758
Price: 156.95 USD
Availability: BackOrder

$156.95

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King Engine Bearings main bearing set for GM LS engines. Size .020 Oversized, Housing Bore +.010.

Key Features

Fits 68+ vehicle make/model combinations.
Main bearing set for GM LS1, LS2, LS4, and LS6 engines.
Bearings are .020 inches oversized.
Requires a housing bore of +.010 inches.
Constructed with a bimetal aluminum silicon alloy base.
Optional upgrade for specific engine builds.

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Will this fit your vehicle?

About this part

Product Details

King Engine Bearings is well-known for making solid engine components, and this main bearing set is a great example of their work for GM LS engines. If you're rebuilding the bottom end of your engine, these bearings are designed to handle the demands of performance and daily driving. They are specifically sized at .020 inches oversized and require a housing bore of +.010 inches, which is crucial for proper fitment and oil clearance during your rebuild.

These bearings are constructed with a bimetal base made from an aluminum silicon alloy. This material choice helps with heat dissipation and wear resistance, important factors for the longevity of your engine's rotating assembly. This set is an optional upgrade over the MB5293SI model when the housing bore is already machined to +.010 inches, ensuring you get the correct fit for your specific engine build.

This main bearing set fits a wide range of GM vehicles, including popular models like the Chevrolet Corvette (1997-2007), Chevrolet Silverado 1500 (1999-2013), and Cadillac CTS (2004-2007). Always double-check your engine's specifications and the required bearing size before ordering to ensure a perfect match for your rebuild project.