What does '0.25 Oversized' mean for these main bearings?

This means the bearings are slightly larger than standard size. They are intended for use when the crankshaft journals have been machined down by 0.25mm to ensure a proper fit and oil clearance. Always check your crankshaft specifications before ordering.

What is the pMax Black material?

The pMax Black material is a tri-metal construction developed by King Engine Bearings for their racing line. It's known for its improved strength and durability compared to standard bearings, making it suitable for high-performance and racing applications.

Do these bearings come with installation instructions?

While this set includes the necessary bearings, it does not come with specific installation instructions. It is highly recommended to consult your vehicle's official service manual for detailed procedures, torque specifications, and proper installation techniques.

Specifications

Brand: King Engine Bearings
Part #: MB5278XP0.25
UPC: 611500577925

King Ford 140Cl 2.3L L4 (Size 0.25 Oversized) Performance Main Bearing Set (Set of 5)

Name: King Ford 140Cl 2.3L L4 (Size 0.25 Oversized) Performance Main Bearing Set (Set of 5)
Brand: King Engine Bearings
SKU: king-engine-bearings-king-ford-140cl-2-3l-l4-size-0-25-oversized-performance-mai-t14-129241
Price: 191.36 USD
Availability: BackOrder

$191.36

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Fits 1989-2001 Ford Ranger. King 0.25mm oversized performance main bearing set for 2.3L engines. Features pMax Black racing material.

Key Features

Fits 1989-2001 Ford Ranger, 1991-1993 Ford Mustang, 1998-2001 Mazda B2500, and 1985-1989 Merkur XR4Ti with 2.3L engines.
Set of 5 main bearings for complete engine coverage.
Features King's pMax Black racing material, a durable tri-metal construction.
Bearings are 0.25mm oversized, designed for use with a machined crankshaft.
This is the performance 'racing line' version of the main bearing set.

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About this part

Product Details

If you're rebuilding the bottom end of your 1989-2001 Ford Ranger with the 2.3L engine, a solid set of main bearings is crucial for proper crankshaft support. This set from King Engine Bearings is designed for performance applications, featuring their pMax Black material. This is a tri-metal material that's well-suited for racing and high-stress builds, offering improved durability under demanding conditions.

This particular set is 0.25mm oversized, meaning it's intended for crankshafts that have been machined down to match this size. The pMax Black material is a popular choice for builders looking for a strong bearing that can handle more abuse than a standard bearing. It's a well-built component that aims to keep your engine running smoothly and reliably when you push it hard.

This set includes all five main bearings needed for your 2.3L engine. Remember to ensure your crankshaft journals are properly prepped and sized to 0.25mm undersize before installation. Always refer to your engine's service manual for the correct installation procedures and torque specifications.