What does '0.020 inch undersize' mean for these bearings?

This means the bearings are manufactured to be 0.020 inches smaller in diameter than standard size. This is used when the engine's crankshaft journals have been machined down to a specific undersize to correct wear or damage.

What is the primary function of main bearings?

Main bearings support the crankshaft within the engine block. They create the necessary clearance for oil to lubricate the rotating crankshaft, reducing friction and wear.

Are these bearings sold individually or as a set?

This product is a main bearing set, meaning it includes all the necessary main bearings required for a complete installation on the specified engine.

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Specifications

Brand: King Engine Bearings
Part #: MB5863MC
UPC: 611500620416

King Engine Bearings Toyota 3UR-FE Main Bearing Set

Name: King Engine Bearings Toyota 3UR-FE Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-toyota-3ur-fe-main-bearing-set-t14-432566
Price: 100.28 USD
Availability: BackOrder

$100.28

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King Engine Bearings MB5863MC Main Bearing Set. This set is 0.020 inch undersize for a precise fit during engine rebuilds.

Key Features

This is a King Engine Bearings Main Bearing Set, part number MB5863MC.
The set is 0.020 inch undersize, suitable for machined crankshaft journals.
Designed for Toyota 3UR-FE engines.

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About this part

Product Details

This is a King Engine Bearings Main Bearing Set, part number MB5863MC. This set is specifically sized at 0.020 inch undersize, which is important for engine rebuilds where crankshaft journals may have been machined to a specific undersize to correct wear or runout.

King Engine Bearings are known for their well-built construction. This set is designed to provide reliable performance for your Toyota 3UR-FE engine. Proper bearing clearance is critical for oil flow and lubrication, which directly impacts engine longevity and performance. Using a precisely sized bearing set like this one helps ensure optimal oil pressure and reduced friction within the engine's rotating assembly.