What does the +0.25 sizing mean for these bearings?

The +0.25 sizing indicates that these bearings are intended for use on a crankshaft that has been machined down by 0.00025 inches. This is common when rebuilding an engine to ensure proper clearances.

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

These bearings are specifically noted as ideal for low to medium-load engines. For high-performance or racing applications, you may need to consult King Engine Bearings' performance line for bearings designed for higher stress levels.

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

The bi-metal aluminum construction offers a good balance. Aluminum alloys are known for their thermal conductivity, helping to dissipate heat, while the bi-metal design provides the necessary strength for bearing surfaces.

Specifications

Brand: King Engine Bearings
Part #: MB5664AM0.25
UPC: 611500539008

King Engine Bearings Nissan QR25DE DOHC 16 Valves (Size +0.25) Main Bearing Set

Name: King Engine Bearings Nissan QR25DE DOHC 16 Valves (Size +0.25) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-nissan-qr25de-dohc-16-valves-size-0-25-t14-280140
Price: 49.55 USD
Availability: BackOrder

$49.55

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King Engine Bearings main bearing set for Nissan QR25DE engines. Size +0.25. Lead-free composite, bi-metal aluminum.

Key Features

Fits a range of vehicles including INFINITI QX60, Nissan Altima, and Nissan Frontier.
Main bearing set sized at +0.25 for machined crankshafts.
Constructed with a lead-free, environmentally safe composite material.
Features a bi-metal aluminum construction.
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

Built with a lead-free, environmentally safe composite material, this King Engine Bearings main bearing set is a solid option for engines like the Nissan QR25DE found in vehicles such as the Altima, Frontier, and Rogue. These bearings are specifically designed for low to medium-load applications, making them a good fit for many everyday drivers and work vehicles. The bi-metal aluminum construction offers a good balance of strength and thermal conductivity.

As bearing specialists since 1960, King focuses on producing reliable engine bearings. This set is sized at +0.25, meaning it's intended for crankshafts that have been machined down by 0.00025 inches. Always refer to your vehicle's service manual or a qualified mechanic to confirm the correct bearing size for your specific engine build, especially if the crankshaft has been previously serviced.