What does the '+1.0mm' sizing mean for these bearings?

The '+1.0mm' indicates that these bearings are designed for use when the engine's main crankshaft journals have been machined down by 1.0mm. This is a common practice during engine rebuilding to correct for wear or to achieve specific oil clearances.

What is the advantage of a bimetal aluminum base construction?

A bimetal construction with an aluminum base offers good thermal conductivity to help manage heat and provides a strong foundation for the bearing surface. This design helps reduce friction and wear on the crankshaft during operation.

Are these bearings a direct replacement for all 1971-1982 Toyota Corollas?

This main bearing set is specifically designed for Toyota engines with 3T, TG, 12T, and 4TG designations. While it fits the specified Corolla years, it's important to confirm your engine code matches the application.

Specifications

Brand: King Engine Bearings
Part #: MB552AM1.0
UPC: 611500169045

King Engine Bearings Toyota 3T/Tg/12T/4Tg (Size +1.0mm) Main Bearing Set

Name: King Engine Bearings Toyota 3T/Tg/12T/4Tg (Size +1.0mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-toyota-3t-tg-12t-4tg-size-1-0mm-main-b-t14-770789
Price: 37.50 USD
Availability: BackOrder

$37.50

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Fits 1971-1982 Toyota Corolla. King Engine Bearings Main Bearing Set MB552AM1.0. Bimetal aluminum base construction.

Key Features

Fits 1971-1982 Toyota Corolla and 1971-1973 Toyota Carina.
Main bearing set for Toyota 3T, TG, 12T, and 4TG engines.
Features a bimetal construction with an aluminum base.
This set is sized +1.0mm for use on machined crankshaft journals.

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About this part

Product Details

This is a King Engine Bearings Main Bearing Set, specifically designed for Toyota 3T, TG, 12T, and 4TG engines, fitting the 1971-1982 Toyota Corolla and 1971-1973 Toyota Carina. These bearings are crucial for the proper function of your engine's crankshaft, ensuring it spins smoothly within the engine block.

Constructed with a bimetal design, these bearings feature an aluminum base. This construction helps manage heat and provides a solid foundation for the bearing surface, which is essential for reducing friction and wear on your crankshaft. The set is sized at +1.0mm, meaning it's intended for engines where the main journals have been machined down by 1.0mm to correct for wear or to achieve a specific clearance.

When rebuilding or repairing your Toyota engine, using correctly sized bearings like these is key to achieving proper oil clearance and ensuring long-term engine health. Always refer to your vehicle's service manual for the correct installation procedures and specifications.