What does the 0.25mm undersize mean for my engine rebuild?

The 0.25mm undersize specification means these bearings are slightly smaller than standard. This is crucial if your engine's crankshaft journals have been machined down (ground undersize) during a rebuild to clean up wear or damage. Using the correct undersize bearing ensures proper clearance and oil film.

What is the Tri-M+ enhanced babbit overlay?

The Tri-M+ overlay is a layer of babbit material applied to the bearing surface. This overlay helps to improve the bearing's ability to conform to the crankshaft and provides a smoother running surface, which is important for reducing friction and wear in medium-load engines.

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

These bearings are described as performance main bearings and are well-suited for medium-load engines. For extreme racing applications with significantly higher loads and RPMs, King Engine Bearings offers other specialized bearing lines that might be more appropriate.

Specifications

Brand: King Engine Bearings
Part #: MB4510CP0.25
UPC: 611500549090

King Engine Bearings Nissan VQ40DE 4L V6 (Size 0.25) Performance Main Bearing Set

Name: King Engine Bearings Nissan VQ40DE 4L V6 (Size 0.25) Performance Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-nissan-vq40de-4l-v6-size-0-25-performa-t14-570622
Price: 107.76 USD
Availability: BackOrder

$107.76

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King Engine Bearings Nissan VQ40DE 4L V6 (Size 0.25) Performance Main Bearing Set. Tri-metal bearings for medium-load engines.

Key Features

Fits 2005-2019 Nissan Frontier, 2012-2021 Nissan NV1500/2500/3500, 2005-2012 Nissan Pathfinder, 2005-2015 Nissan Xterra, and 2009-2012 Suzuki Equator.
Main bearing set is 0.25mm undersize, intended for use with machined crankshaft journals.
Constructed from a tri-metal copper-based material for strength and durability.
Features King's Tri-M+ enhanced babbit overlay for improved performance.
Ideal for medium-load engine applications.

⚠️ 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

If you're rebuilding the bottom end of your Nissan VQ40DE 4-liter V6, these performance main bearings from King Engine Bearings are a solid option. They are specifically sized at 0.25mm undersize, which is important if your crankshaft journals have been machined down during the rebuild process. King has been specializing in bearings since 1960, focusing on supplying well-built engine bearings for a wide range of applications.

These main bearings are constructed with a tri-metal copper-based material, featuring King's Tri-M+ enhanced babbit overlay. This design is well-suited for medium-load engines, offering durability and reliable performance for your VQ40DE. They are designed to fit right into a variety of Nissan and Suzuki vehicles that use this popular V6 engine, including the Frontier, Pathfinder, and Xterra.