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

This means the bearings are designed to fit a crankshaft that has been machined down by 0.25mm. It's important to match the bearing size to the machined journal size for proper oil clearance.

What is a bimetal bearing?

A bimetal bearing uses two different metal layers. In this case, it has an aluminum base, which is good for handling engine loads and heat, combined with other layers for strength and wear resistance.

Are these bearings sold individually or as a set?

This is a main bearing set, meaning it includes all the main bearings needed for your Toyota 12R engine's crankshaft.

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Specifications

Brand: King Engine Bearings
Part #: MB348AM0.25
UPC: 611500151514

King Engine Bearings Toyota 12R/(Size +0.25mm) Main Bearing Set

Name: King Engine Bearings Toyota 12R/(Size +0.25mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-toyota-12r-size-0-25mm-main-bearing-se-t14-770301
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 engines. This set is 0.25mm oversized for engine rebuilding.

Key Features

Fits Toyota 12R engines.
Main bearing set.
Bimetal construction with an aluminum base.
This set is 0.25mm oversized for use with machined crankshafts.

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About this part

Product Details

King Engine Bearings is well-known for making solid engine bearings. This main bearing set is made for Toyota 12R engines. It's a bimetal bearing with an aluminum base, which is a common and effective design for handling the loads in an engine's bottom end.

This particular set is 0.25mm oversized, meaning it's intended for use when the crankshaft journals have been machined down to match this size during an engine rebuild. Using the correct size bearings is crucial for proper oil clearance, which ensures your engine runs smoothly and lasts longer. King's bimetal construction helps manage heat and wear effectively.