What does the +0.25mm sizing mean for these bearings?

The +0.25mm sizing indicates that these bearings are intended for use when the crankshaft journals have been machined down by 0.25mm (approximately 0.010 inches). This is a common practice when rebuilding an engine to ensure a proper fit and oil clearance on a crankshaft that has wear or has been resurfaced.

Are these bearings suitable for high-performance or racing engines?

These bearings are described as ideal for medium-load engines. While they are well-built, King Engine Bearings offers other series designed for higher-performance applications. For racing or extreme performance builds, it's always best to consult the manufacturer's specific recommendations for your application.

What is the benefit of a bi-metal aluminum material?

The bi-metal aluminum construction offers a good balance of strength and conformability, which helps the bearing adapt to the crankshaft surface for optimal oil film support. Being lead-free also makes them an environmentally safer choice compared to older bearing materials.

Specifications

Brand: King Engine Bearings
Part #: MB5286SI0.25
UPC: 611500581496

King Engine Bearings Toyota 1Uz-Fe/2Uz-Fe/3Uz-Fe (Size +0.25mm) Main Bearing Set

Name: King Engine Bearings Toyota 1Uz-Fe/2Uz-Fe/3Uz-Fe (Size +0.25mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-toyota-1uz-fe-2uz-fe-3uz-fe-size-0-25m-t14-770631
Price: 129.00 USD
Availability: BackOrder

$129.00

On Backorder

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King Engine Bearings Toyota 1Uz-Fe/2Uz-Fe/3Uz-Fe (Size +0.25mm) Main Bearing Set. These bi-metal bearings are a solid option for rebuilding medium-load V8 engines.

Key Features

Fits many Lexus and Toyota V8 engines including the 1UZ-FE, 2UZ-FE, and 3UZ-FE.
Main bearing set is sized +0.25mm for use with machined crankshaft journals.
Constructed from a bi-metal aluminum material.
Features a lead-free, environmentally safe composite.
Well-suited for medium-load engine applications.
Specialized design from a company focused on engine bearings since 1960.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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About this part

Product Details

When you're rebuilding the bottom end of a V8 engine like those found in many Lexus GS400s, LS400s, or Toyota Tundras, you need main bearings you can trust. This set from King Engine Bearings is specifically designed for Toyota's 1UZ-FE, 2UZ-FE, and 3UZ-FE engines, and it's sized at +0.25mm, meaning it's intended for crankshaft journals that have been machined down by that amount. King has been specializing in bearings since 1960, focusing on supplying well-built components for the marketplace.

These particular main bearings are constructed from a bi-metal aluminum material, making them a lead-free and environmentally safe composite. This construction is ideal for medium-load engines, offering reliable performance for daily drivers and work vehicles. The focus on specialization means King has developed a deep understanding of what makes a bearing perform well over time, ensuring a solid option for your engine build.