What does the +0.5 size mean for these bearings?

The +0.5 size indicates that these bearings are 0.020 inches (0.5mm) undersize. They are intended for use when the crankshaft journals have been machined down by this amount during an engine rebuild to clean up wear or damage.

What type of engine is this bearing set best suited for?

This bearing set is made with a lead-free composite and bi-metal aluminum material, making it ideal for engines that operate under low to medium loads. It's a well-built option for many common vehicle applications.

Does this main bearing set come with all the necessary components for installation?

This product is a main bearing set, which includes the main bearings themselves. It does not typically include other components like crankshaft seals or oil, which may be needed for a complete engine rebuild.

Specifications

Brand: King Engine Bearings
Part #: MB5664AM0.5
UPC: 611500539015

King Engine Bearings Nissan QR25DE DOHC 16 Valves (Size +0.5) Main Bearing Set

Name: King Engine Bearings Nissan QR25DE DOHC 16 Valves (Size +0.5) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-nissan-qr25de-dohc-16-valves-size-0-5--t14-280141
Price: 49.55 USD
Availability: BackOrder

$49.55

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King Engine Bearings Nissan QR25DE DOHC 16 Valves (Size +0.5) Main Bearing Set. A well-built main bearing set for low to medium-load engines.

Key Features

Fits many Nissan and Infiniti vehicles, including Altima, Frontier, and Rogue.
Main bearing set is sized +0.5 (0.020 inches undersize) for machined crankshaft journals.
Constructed with a bi-metal aluminum material.
Lead-free and environmentally safe composite.
Ideal for low to medium-load engines.

⚠️ 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

King Engine Bearings has been focused on making top-notch engine bearings since 1960. This main bearing set, part number MB5664AM0.5, is built for engines like the Nissan QR25DE DOHC. It's a +0.5 size set, meaning it's designed for crankshaft journals that have been machined down by 0.020 inches (0.5mm) during an engine rebuild. This is a common size when you need to clean up the crank journals after wear.

This set uses a bi-metal aluminum material that's lead-free and environmentally safe, making it a solid choice for engines that don't see extreme loads. It's a well-built component that helps ensure proper oil clearance and smooth rotation of your crankshaft. If you're rebuilding the bottom end of a compatible Nissan or Infiniti vehicle, like a Sentra, Altima, or Frontier, this bearing set is designed to fit right in.