What does '0.25mm undersize' mean for these bearings?

This means the bearings are manufactured to be 0.25mm smaller in diameter than standard size. They are intended for use when the engine's crankshaft has been machined (ground) undersize during a rebuild to account for wear.

What engines are compatible with this bearing set?

This set is designed for Honda B-series (B16, B17, B18) and K-series (K20, K24) engines, as well as other compatible Honda engine families from approximately 1990-2005.

Do I need to buy anything else to install these bearings?

Yes, engine bearing installation typically requires engine assembly lubricant to ensure proper oiling during initial startup. Always refer to your vehicle's service manual for complete installation procedures and recommended materials.

ACL 90-05 Honda B16/17/18 K20/24 0.25mm Oversized Main Bearing Set

Specifications

Brand: ACL
Part #: 5M1959A-.25
UPC: 084777700205

ACL 90-05 Honda B16/17/18 K20/24 0.25mm Oversized Main Bearing Set

Name: ACL 90-05 Honda B16/17/18 K20/24 0.25mm Oversized Main Bearing Set
Brand: ACL
Price: 14.32 USD
Availability: InStock

$14.32

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ACL 2007-2012 Acura RDX Main Bearings. This 0.25mm undersize set ensures a proper fit for your engine rebuild.

Key Features

Fits 2007-2012 Acura RDX and 2004-2008 Acura TSX.
0.25mm undersize main bearing set for Honda B-series and K-series engines.
Manufactured by ACL for precise fitment.
Designed for engine rebuilds where crankshaft journals have been ground undersize.

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Fits these vehicles

Acura RDX 2007-2012
Acura TSX 2004-2008

Product Details

This ACL main bearing set is built for Honda B-series, K-series, and other compatible engines. They are manufactured to precise tolerances, ensuring they fit right into your engine block. The 0.25mm undersize specification is important for engines that have had their crankshaft ground undersize during a rebuild. Using the correct undersize bearing is crucial for maintaining proper oil clearance and ensuring the longevity of your engine.

When you're rebuilding an engine, using well-built internal components like these ACL bearings is key to a successful outcome. They are a solid option for anyone looking to restore their engine's performance and reliability.