What does the +0.75mm sizing mean for these bearings?

The +0.75mm designation means these bearings are 0.75mm undersize. This indicates they are intended for use on a crankshaft that has been machined down by 0.75mm during an engine rebuild or repair process.

What type of engine is this bearing set designed for?

This main bearing set is specifically made for Ford 140 cubic inch (2.3 Liter) L4 engines. The lead-free composite material is well-suited for engines that operate under low to medium load conditions.

Are these bearings environmentally safe?

Yes, these bearings utilize a lead-free composite material, making them an environmentally safe option compared to older bearing technologies.

Specifications

Brand: King Engine Bearings
Part #: MB5278AM0.75
UPC: 611500381096

King Engine Bearings Ford 140Ci /2.3Liter/L4 (Size +0.75mm) Main Bearing Set

Name: King Engine Bearings Ford 140Ci /2.3Liter/L4 (Size +0.75mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-ford-140ci-2-3liter-l4-size-0-75mm-mai-t14-770616
Price: 53.85 USD
Availability: BackOrder

$53.85

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Fits 1989-2001 Ford Ranger. King Engine Bearings main bearing set, 0.75mm undersize. Lead-free composite ideal for low to medium-load engines.

Key Features

Fits 1989-2001 Ford Ranger, 1991-1993 Ford Mustang, 1998-2001 Mazda B2500, and 1985-1989 Merkur XR4Ti.
Main bearing set sized at +0.75mm (0.75mm undersize).
Features a lead-free composite material, ideal for low to medium-load engines.
Constructed with a bi-metal aluminum material for good heat transfer.
Designed to meet the specific needs of Ford 140ci / 2.3 Liter L4 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

This is a set of main bearings from King Engine Bearings, specifically sized at +0.75mm for Ford 140ci (2.3L) L4 engines. These bearings are crucial for supporting the crankshaft within the engine block, ensuring it spins smoothly and with minimal friction. If you're rebuilding the bottom end of your 1989-2001 Ford Ranger, 1991-1993 Ford Mustang, 1998-2001 Mazda B2500, or 1985-1989 Merkur XR4Ti, these bearings are designed to fit right in.

King Engine Bearings specializes in creating well-built bearings, and this set uses a lead-free composite material. This type of material is environmentally safe and works well in engines that don't experience extremely high loads, making it a solid option for many applications. The bi-metal aluminum construction offers good thermal conductivity, helping to dissipate heat away from the critical bearing surfaces. Remember, these are a +0.75mm undersize, meaning they are intended for crankshafts that have been machined down by that amount during an engine rebuild.