What does '0.75mm oversized' mean for these bearings?

This means the bearings are designed to fit a crankshaft that has been machined down by 0.75mm. This is a common practice during engine rebuilds to ensure a fresh, properly sized surface for the bearings.

What is the advantage of a bimetal bearing with an aluminum base?

Bimetal bearings offer a good balance of strength and conformability. The aluminum base helps with heat dissipation and provides a good surface for oil retention, which is important for maintaining oil pressure.

Are these bearings sold individually or as a set?

This product is a main bearing set, meaning it includes all the necessary main bearings to complete the installation on your Toyota 12R engine.

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Specifications

Brand: King Engine Bearings
Part #: MB348AM0.75
UPC: 611500151538

King Engine Bearings Toyota 12R/(Size +0.75mm) Main Bearing Set

Name: King Engine Bearings Toyota 12R/(Size +0.75mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-toyota-12r-size-0-75mm-main-bearing-se-t14-770303
Price: 75.38 USD
Availability: BackOrder

$75.38

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

King Engine Bearings Main Bearing Set for Toyota 12R. These bimetal bearings are 0.75mm oversized for engine rebuilding.

Key Features

Fits Toyota 12R engines.
Main bearing set for engine rebuilding.
Bimetal construction with an aluminum base.
Bearings are 0.75mm oversized for use with machined crankshafts.

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About this part

Product Details

When you're rebuilding the bottom end of your Toyota 12R engine, getting the main bearings right is crucial for proper crankshaft support and oil pressure. This set from King Engine Bearings is designed specifically for that task, offering a bimetal construction with an aluminum base for good performance in demanding conditions.

These bearings are built to fit your Toyota 12R engine, and they come 0.75mm oversized. This means they're intended for use when the crankshaft journals have been machined down by 0.75mm during an engine rebuild. The bimetal design helps manage heat and wear, ensuring smooth operation and consistent oil film between the crank and the block.