What does '0.25mm undersize' mean for these bearings?

This means the bearings are manufactured to be slightly smaller than standard size. They are intended for use when the crankshaft journals have been machined down by 0.25mm during an engine rebuild to correct wear or damage.

What type of engine is this bearing set for?

This main bearing set is specifically designed for Ford and Mazda L3 and L3-VDT MZR engines. These are common in various performance models from these manufacturers.

What is the material of these bearings?

These bearings are made from King's tri-metal material. This construction offers a strong yet conformable surface that is crucial for maintaining oil pressure and handling engine loads.

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Specifications

Brand: King Engine Bearings
Part #: MB5442MC0.25
UPC: 61150062176

King Engine Bearings Ford/Mazda L3/ L3-VDT MZR (Size 0.25) Main Bearing Set

Name: King Engine Bearings Ford/Mazda L3/ L3-VDT MZR (Size 0.25) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-ford-mazda-l3-l3-vdt-mzr-size-0-25-mai-t14-432464
Price: 95.31 USD
Availability: BackOrder

$95.31

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King Engine Bearings Main Bearing Set MB5442MC0.25. These are 0.25mm undersize bearings for Ford/Mazda L3/L3-VDT MZR engines.

Key Features

This is a 0.25mm undersize main bearing set.
Designed for Ford and Mazda L3 and L3-VDT MZR engines.
Features King's tri-metal bearing material for durability.
Helps maintain oil pressure in rebuilt engines.

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About this part

Product Details

These King Engine Bearings main bearings are 0.25mm undersize, meaning they are designed to be used when the crankshaft journals have been machined down by 0.25mm during an engine rebuild. They are built for Ford and Mazda L3 and L3-VDT MZR engines, which are common in many performance-oriented vehicles from these manufacturers.

King uses a specialized tri-metal material for these bearings, which offers a good balance of strength and conformability. This helps them handle the stresses of engine operation while still conforming to the crankshaft to maintain oil pressure. The 'C' in the part number indicates a specific design feature for this application, ensuring a solid option for rebuilding your engine's bottom end.