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

The +0.50mm sizing indicates that these bearings are designed for use when the crankshaft journals have been machined down by 0.50mm. This is a common practice during engine rebuilds to ensure proper fit and oil clearance with worn or resurfaced crankshafts.

What is the advantage of a bimetal aluminum silicon construction?

A bimetal construction with an aluminum silicon base offers a good balance of strength and conformability. This material helps manage heat effectively and provides good wear resistance, which is crucial for the longevity of engine bearings.

Are these bearings a direct replacement for the original equipment?

These are replacement main bearings designed for specific Honda engines. They are sized at +0.50mm, so they are intended for use after the crankshaft has been machined to that specific undersize, not as a direct, no-machining-required replacement for stock bearings.

Specifications

Brand: King Engine Bearings
Part #: MB5427SI0.5
UPC: 611500481574

King Engine Bearings Honda L13A4/L15A (Size +0.50mm) Main Bearing Set

Name: King Engine Bearings Honda L13A4/L15A (Size +0.50mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-honda-l13a4-l15a-size-0-50mm-main-bear-t14-770694
Price: 63.46 USD
Availability: BackOrder

$63.46

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Fits 2003-2005 Honda Civic. King Engine Bearings main bearing set with bimetal aluminum silicon construction for improved durability.

Key Features

Fits 2003-2005 Honda Civic and 2007-2008 Honda Fit.
Main bearing set sized at +0.50mm for use with machined crankshafts.
Constructed with a bimetal aluminum silicon base for heat and wear management.
Designed for Honda L13A4 and L15A engines.

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About this part

Product Details

This main bearing set from King Engine Bearings features a bimetal construction with an aluminum silicon base, a material choice that helps manage heat and wear in your Honda L13A4 or L15A engine. These bearings are specifically sized at +0.50mm, meaning they are intended for use when the crankshaft journals have been machined down by 0.50mm during an engine rebuild.

King Engine Bearings is known for well-built components, and this set is no different. The bimetal design offers a good balance of strength and conformability, allowing the bearing to properly seat and maintain oil film under operating conditions. This is a critical part of your engine's rotating assembly, ensuring the crankshaft spins smoothly within the engine block.

If you're rebuilding the bottom end of your 2003-2005 Honda Civic or a compatible Honda Fit, this +0.50mm main bearing set is a solid option. Always ensure your crankshaft journals have been properly measured and machined to the correct undersize before installing these bearings, and refer to the manufacturer's installation instructions for proper oil clearances and assembly procedures.