What does it mean that these bearings are 0.025 inch undersize?

This means the inner diameter of the bearings is slightly smaller than standard. This size is used when the crankshaft journals have been machined down (ground) by 0.025 inches during a previous rebuild or repair to ensure proper clearance.

What is the advantage of the tri-metal material used in these bearings?

The tri-metal construction offers improved performance under higher loads and temperatures compared to standard bearings. This makes them a solid choice for performance applications or engine rebuilds where durability is key.

Do I need to purchase anything else to install these main bearings?

When installing main bearings, it's standard practice to also replace the main bearing cap bolts and use a quality assembly lube. Always refer to your vehicle's service manual for a complete list of recommended parts and procedures.

Specifications

Brand: ACL
Part #: 5M8088H-.025

ACL Lexus V8 1UZFE 4.0L Race Series - supercedes 5M8092H Engine Crankshaft Main Bearing Set

Name: ACL Lexus V8 1UZFE 4.0L Race Series - supercedes 5M8092H Engine Crankshaft Main Bearing Set
Brand: ACL
SKU: acl-acl-lexus-v8-1uzfe-4-0l-race-series-supercedes-5m8092h-engine-crankshaft-mai-t14-632463
Price: 199.94 USD
Availability: BackOrder

$199.94

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ACL Race Series Crankshaft Main Bearing Set 5M8088H-.025 for Lexus V8 1UZFE 4.0L engines. 0.025 inch undersize.

Key Features

Fits 1998-2000 Lexus GS400, 2003-2009 Lexus GX470, 1990-2000 Lexus LS400, 1998-2007 Lexus LX470, 1992-2000 Lexus SC400, 2003-2009 Toyota 4Runner, 1998-2007 Toyota Land Cruiser, 2001-2009 Toyota Sequoia, and 2000-2009 Toyota Tundra.
Designed for Lexus V8 1UZFE 4.0L engines.
Race Series main bearing set.
Features a tri-metal material for improved load and temperature handling.
Precision-machined for exact tolerances.
This set is 0.025 inch undersize for crankshafts that have been machined.

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About this part

Product Details

When you're rebuilding or refreshing a Lexus V8 1UZFE 4.0L engine, the main bearings are critical. This ACL Race Series set is designed for performance and durability, using a tri-metal material that handles higher loads and temperatures. They are precision-machined to exact tolerances, ensuring proper oil clearance for your crankshaft. This particular set is 0.025 inches undersize, which is important if your crankshaft has been ground down during a previous rebuild or repair.

This set fits a wide range of Lexus and Toyota vehicles, including the GS400, GX470, LS400, LX470, SC400, 4Runner, Land Cruiser, Sequoia, and Tundra. Make sure to check the specific year ranges for your vehicle to confirm fitment. Proper installation is key; always refer to your vehicle's service manual for the correct torque specifications and procedures.