What does 'Housing Bore +.010' mean for these bearings?

This indicates that the engine's main bearing housings have been machined to be 0.010 inches larger than stock. The bearings in this set are also 0.010 inches oversized to match that specific machining.

What is trimetal construction?

Trimetal bearings use three layers of material: a steel backing for strength, a copper-lead alloy for embeddability and strength, and a nickel-plated babbit overlay for low friction and corrosion resistance.

Are these bearings a direct replacement for a stock engine?

No, these bearings are specifically for an engine that has had its main bearing housings machined to be 0.010 inches larger than the original factory size.

Specifications

Brand: King Engine Bearings
Part #: MB5775CP0.25
UPC: 611500586903

King Engine Bearings Isuzu 4HK1 (Housing Bore +.010) (Size 0.25 Oversized) Main Bearing Set

Name: King Engine Bearings Isuzu 4HK1 (Housing Bore +.010) (Size 0.25 Oversized) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-isuzu-4hk1-housing-bore-010-size-0-25--t14-45760
Price: 171.96 USD
Availability: BackOrder

$171.96

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King Engine Bearings main bearing set for Isuzu 4HK1-TCN. Housing bore +.010, 0.25 oversized.

Key Features

Fits Isuzu 4HK1-TCN engines with a housing bore of +.010 inches.
Main bearing set is 0.25mm (0.010 inches) oversized.
Constructed with a trimetal material for durability and performance.
Designed to ensure proper oil clearance and load distribution.

This main bearing set is specifically for Isuzu 4HK1-TCN engines with a housing bore of +.010 inches.

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About this part

Product Details

Built with a trimetal construction, this main bearing set from King Engine Bearings is made for Isuzu 4HK1-TCN engines where the housing bore is +.010 inches. This means the bearings themselves are 0.25mm (or roughly 0.010 inches) oversized to account for machining that has already been done to the engine block's main bearing bores. This specific sizing is crucial for ensuring proper oil clearance and load distribution within the engine.

King Engine Bearings is known for its well-built components, and this set is no exception. The trimetal design offers a good balance of strength and conformability, which helps it adapt to the crankshaft and maintain consistent oil film. This is important for reducing friction and wear on critical engine parts, especially during the break-in period and under normal operating conditions.

If you're rebuilding an Isuzu 4HK1-TCN and have had the main bearing housings machined to +.010 inches, this set is designed to fit right in. It's a solid option for ensuring the longevity and performance of your engine's bottom end.