What does the 0.25 size mean for these bearings?

The '0.25' indicates that these bearings are 0.25mm undersize. This means they are intended for use when the crankshaft journals have been machined down by 0.25mm as part of an engine rebuild process.

What vehicles does this bearing set fit?

This set fits a variety of vehicles equipped with the Mazda MZR 2.3L 16V or Ford Duratec 2.3L 16V engine. This includes models like the Ford Focus, Ford Escape, Mazda 3, and Mercury Mariner, among others.

Are these bearings suitable for high-performance builds?

These bearings are described as being ideal for medium-load engines. For high-performance or extreme-load applications, it's always best to consult the manufacturer's specifications or a performance engine builder to ensure the correct bearing is chosen.

Specifications

Brand: King Engine Bearings
Part #: CR4507SI0.25
UPC: 611500512780

King Mazda MZR 2.3L 16V / Ford Duratec 2.3L 16V (Size .25) Connecting Rod Bearing Set (Set of 8)

Name: King Mazda MZR 2.3L 16V / Ford Duratec 2.3L 16V (Size .25) Connecting Rod Bearing Set (Set of 8)
Brand: King Engine Bearings
SKU: king-engine-bearings-king-mazda-mzr-2-3l-16v-ford-duratec-2-3l-16v-size-25-conne-t14-711997
Price: 24.67 USD
Availability: BackOrder

$24.67

On Backorder

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King connecting rod bearing set for Mazda MZR 2.3L and Ford Duratec 2.3L engines. Size 0.25. A well-built option for engine rebuilds.

Key Features

Fits a range of vehicles including Ford Escape, Focus, Fusion, Mazda 3, 6, CX-7, Tribute, Mercury Mariner, and Milan.
Connecting rod bearing set for Mazda MZR 2.3L 16V and Ford Duratec 2.3L 16V engines.
Size is 0.25, intended for use with machined crankshaft journals.
Constructed from bi-metal aluminum material.
Suitable for medium-load engines.
Features a lead-free composite for environmental safety.

⚠️ 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 engine in your Mazda 3, Ford Focus, or another compatible vehicle, getting the connecting rod bearings right is crucial. These bearings sit between the connecting rod and the crankshaft, allowing the rod to spin smoothly while handling significant loads. This set from King Engine Bearings is specifically made for the Mazda MZR 2.3L 16V and Ford Duratec 2.3L 16V engines.

King has been specializing in bearings since 1960, focusing on supplying well-built components. This particular set is constructed from a bi-metal aluminum material, making it suitable for medium-load engines. They are also lead-free, which is a notable environmental consideration. This set is sized 0.25, meaning it's intended for use when the crankshaft journals have been machined down by 0.25mm during an engine rebuild.