What does '+1.0mm undersize' mean for these bearings?

This means the bearings are manufactured to be 1.0mm smaller in diameter than standard. They are designed for use when the engine's crankshaft has been machined down by 1.0mm to remove imperfections or wear during an engine rebuild.

What is the construction of these main bearings?

These are bimetal bearings, featuring an aluminum base. This type of construction is chosen for its ability to handle engine loads and manage heat effectively.

Are these bearings a direct replacement for all 2A, 3A, and 4A engines?

These bearings are designed for the specified Toyota 2A, 3A, and 4A engines and are a +1.0mm undersize. You must confirm that your crankshaft has been machined to this specific size for these bearings to be compatible.

Specifications

Brand: King Engine Bearings
Part #: MB535AM1.0
UPC: 611500165641

King Engine Bearings Toyota 2A/3A/4A/(Size +1.0mm) Main Bearing Set

Name: King Engine Bearings Toyota 2A/3A/4A/(Size +1.0mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-toyota-2a-3a-4a-size-1-0mm-main-bearin-t14-770664
Price: 33.48 USD
Availability: BackOrder

$33.48

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Fits 1983-1997 Toyota Corolla. King Engine Bearings main bearing set for 2A, 3A, and 4A engines. This is a +1.0mm undersize set.

Key Features

Fits 1983-1997 Toyota Corolla, 1990-1993 Toyota Celica, and 1980-1988 Toyota Tercel.
Designed for Toyota 2A, 3A, and 4A engine applications.
This is a main bearing set, which supports the crankshaft.
Features a bimetal construction with an aluminum base for effective heat and wear management.
This set is 1.0mm undersize, intended for use with a machined crankshaft.

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About this part

Product Details

This is a main bearing set from King Engine Bearings, specifically designed for Toyota 2A, 3A, and 4A engines found in models like the 1983-1997 Corolla, as well as the Celica and Tercel. Main bearings are crucial components that support the crankshaft within the engine block, allowing it to rotate smoothly while handling significant loads.

This particular set is a bimetal bearing, meaning it has an aluminum base. This construction helps manage heat and wear effectively. It's important to note that this is a +1.0mm undersize bearing set, meaning it's intended for crankshafts that have been machined down by 1.0mm during an engine rebuild. Using the correct size bearing is essential for proper oil clearance and engine longevity.