What does '0.25 Oversized' mean for these bearings?

The '0.25 Oversized' designation, indicated as 0.25mm undersize in the specs, means these bearings are intended for a crankshaft that has been machined down by 0.25mm. This is done to achieve the correct oil clearance when rebuilding an engine.

What material are these main bearings made from?

These bearings are constructed from a tri-metal material, which is a common and robust choice for engine bearings. This material provides a good balance of strength and the ability to conform to the crankshaft journal.

Does this set include all the main bearings needed for an engine rebuild?

This is a main bearing set, which typically includes all the main bearings required for the crankshaft. Always refer to the product packaging or manufacturer's specifications to confirm the exact contents of the set.

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Specifications

Brand: King Engine Bearings
Part #: MB5743CP0.25
UPC: 611500583315

King Engine Bearings Isuzu 4HK1 (Size 0.25 Oversized) Main Bearing Set

Name: King Engine Bearings Isuzu 4HK1 (Size 0.25 Oversized) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-isuzu-4hk1-size-0-25-oversized-main-be-t14-45748
Price: 144.54 USD
Availability: BackOrder

$144.54

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King Engine Bearings Isuzu 4HK1 (Size 0.25 Oversized) Main Bearing Set. These main bearings are 0.25mm undersize for a specific crankshaft journal size.

Key Features

Main bearing set for Isuzu 4HK1-TCN engines.
Bearings are 0.25mm undersize for use with a machined crankshaft.
Constructed with a durable tri-metal material.
Features King's CP overlay for improved wear resistance.

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About this part

Product Details

These main bearings are 0.25mm undersize, meaning they are designed to be used with a crankshaft that has been machined down by 0.25mm. This is a common practice when rebuilding an engine to ensure proper clearances. This set from King Engine Bearings is built for the Isuzu 4HK1-TCN engine, a well-known diesel powerplant.

King uses a tri-metal material for these bearings, which is a standard in high-performance and heavy-duty applications. This material offers a good balance of strength and conformability, helping to protect the crankshaft journal. The CP designation in the part number indicates a specific overlay material that King uses, known for its durability and resistance to wear. When installing these, always ensure the crankshaft journals are clean and within the specified tolerance for the 0.25mm undersize dimension to achieve the correct oil clearance.