What does the 0.75mm undersize mean for this bearing set?

The 0.75mm undersize indicates that these bearings are intended for a crankshaft that has been machined down by 0.75mm. This is a common practice during engine rebuilds to correct wear or damage on the crankshaft journals.

What is the material of these main bearings?

These main bearings are constructed from a bimetal material, featuring an aluminum silicon base. This type of bearing material is chosen for its good wear characteristics and ability to handle engine loads.

Are these bearings a direct replacement for the original equipment?

These are an aftermarket replacement main bearing set. They are designed to fit the specified Honda engines and are sized 0.75mm undersize for use with a machined crankshaft during an engine rebuild.

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Specifications

Brand: King Engine Bearings
Part #: MB5427SI0.75
UPC: 611500481581

King Engine Bearings Honda L13A4/L15A (Size +0.75mm) Main Bearing Set

Name: King Engine Bearings Honda L13A4/L15A (Size +0.75mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-honda-l13a4-l15a-size-0-75mm-main-bear-t14-770695
Price: 63.46 USD
Availability: BackOrder

$63.46

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Fits 2003-2005 Honda Civic. King Engine Bearings main bearing set, 0.75mm undersize, for L13A4/L15A engines.

Key Features

Fits 2003-2005 Honda Civic.
Main bearing set for Honda L13A4/L15A engines.
Features a bimetal construction with an aluminum silicon base.
This set is 0.75mm undersize for use with a machined crankshaft.

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About this part

Product Details

King Engine Bearings is known for making well-built engine components, and this main bearing set is no exception. If you're rebuilding the bottom end of your 2003-2005 Honda Civic with an L13A4 or L15A engine, these bearings are a solid choice for getting your engine back in shape.

These main bearings are made from a bimetal construction with an aluminum silicon base, which is a common and reliable material for engine bearings. This set is specifically sized at 0.75mm undersize, meaning it's intended for crankshafts that have been machined down by that amount during an engine rebuild. Using the correct undersize bearing is crucial for ensuring proper oil clearance and engine longevity.