What does the 0.25 size designation mean for these bearings?

The 0.25 designation indicates that these main bearings are 0.025 inches undersize. This is a common size for engine rebuilding, allowing for fine-tuning of clearances when crankshaft journals have been machined.

What is the benefit of the lead-free composite material?

The lead-free composite material is environmentally safe and offers good embeddability, meaning it can accommodate minor imperfections in the crankshaft surface. This helps ensure smooth operation and reduces the risk of bearing damage.

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

These bearings are described as ideal for medium-load engines. For high-performance or racing applications with significantly higher loads and RPMs, it's recommended to consult King Engine Bearings' specialized product lines.

Specifications

Brand: King Engine Bearings
Part #: MB5442SI0.25
UPC: 611500520068

King Ford/Mazda Duratec 2.0/2.3 DOHC (Size 0.25) Silicon Bi-Metal Aluminum Main Bearing Set

Name: King Ford/Mazda Duratec 2.0/2.3 DOHC (Size 0.25) Silicon Bi-Metal Aluminum Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-ford-mazda-duratec-2-0-2-3-dohc-size-0-25-silicon-bi-m-t14-261740
Price: 77.94 USD
Availability: BackOrder

$77.94

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King Engine Bearings MB5442SI0.25 main bearing set for Ford/Mazda Duratec 2.0/2.3 DOHC. 0.25 undersize. Lead-free composite.

Key Features

Fits 2005-2008 Ford Escape, 2003-2011 Ford Focus, 2006-2009 Ford Fusion, and many other Ford, Mazda, and Lincoln vehicles.
Main bearing set for Ford/Mazda Duratec 2.0L and 2.3L DOHC engines.
Bearings are 0.025 inches undersize (0.25).
Constructed with a bi-metal aluminum material.
Features a lead-free, environmentally safe composite overlay.
Silicon content in the bi-metal improves wear resistance and embeddability.

⚠️ 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 specializing in engine bearings since 1960, focusing on supplying the highest quality components available. This main bearing set, part number MB5442SI0.25, is designed for Ford and Mazda vehicles equipped with the Duratec 2.0L or 2.3L DOHC engines. It's important to note that these bearings are 0.025 inches undersize, which is crucial for proper installation and engine assembly when rebuilding or repairing your engine.

This set features a bi-metal aluminum material with a lead-free, environmentally safe composite overlay. This construction is ideal for medium-load engines, offering a durable and reliable solution for your engine's crankshaft support. The silicon content in the bi-metal construction helps improve wear resistance and embeddability, ensuring a longer service life for your engine components.

This main bearing set fits a wide range of vehicles, including models like the Ford Fusion, Ford Escape, and Mazda 3. When rebuilding your engine, using bearings specifically designed for your application and correctly sized is key to a successful and long-lasting repair.