What does '0.025mm oversized' mean for these bearings?

This means the bearings are slightly larger than standard size by 0.025mm. They are intended for use when the crankshaft journals have been machined down to a corresponding undersize to correct wear or prepare for a performance build. This ensures the correct oil clearance is maintained.

What is the tri-metal construction?

Tri-metal bearings have three layers: a steel backing for strength, a copper-lead alloy for load carrying, and a softer overlay (like babbitt) for conformity and embeddability. This design is well-regarded for its durability and ability to protect the crankshaft.

Do these bearings come with new rod bolts?

This product is a set of rod bearings only. New rod bolts are typically recommended or required for engine rebuilds, but they are sold separately. Always consult your vehicle's service manual for specific recommendations.

Specifications

Brand: ACL
Part #: 4B1906H-.025
UPC: 9315726163146

ACL Acura/Honda K20A3 / 98+ Honda F23A 0.025mm Oversized High Performance Rod Bearing Set

Name: ACL Acura/Honda K20A3 / 98+ Honda F23A 0.025mm Oversized High Performance Rod Bearing Set
Brand: ACL
SKU: acl-acl-acura-honda-k20a3-98-honda-f23a-0-025mm-oversized-high-performance-rod-b-t14-12942
Price: 62.44 USD
Availability: BackOrder

$62.44

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Key Features

Fits Acura CL (1998-1999), RSX (2002-2006), Honda Accord (1998-2002), Civic (2002-2005), Odyssey (1998), and Isuzu Oasis (1999).
0.025mm oversized for use with reconditioned crankshaft journals.
Tri-metal construction offers a strong bearing surface with good debris embedding characteristics.
High-performance overlay is built to withstand increased engine loads.
Designed for K20A3 and 98+ Honda F23A engine applications.

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About this part

Product Details

ACL's 4B1906H-.025 rod bearing set is built with a high-performance overlay that's designed to handle the demands of modified K20A3 and F23A engines. These bearings are 0.025mm oversized, which is crucial for ensuring proper oil clearance when the crankshaft journals have been machined down to true them up after wear or during a performance build. ACL uses a tri-metal material construction, which is well-known for its strength and ability to embed debris, helping to protect your crankshaft from damage.

When you're rebuilding an engine, especially one that's going to see more stress than stock, getting the bearing clearances just right is critical for longevity and performance. These ACL bearings are a popular choice because they offer a solid balance of durability and performance for builds that go beyond factory specifications. The 0.025mm oversize means they're intended for use with a crankshaft that has been reconditioned to a specific undersize, so make sure to check your machining specs before ordering.

This set includes rod bearings for your Acura or Honda engine. Always refer to your engine's service manual for specific installation procedures and torque specifications.