Name: ACL Toyota 4 1452-1587cc 1980-83 Engine Crankshaft Main Bearing Set
Brand: ACL
SKU: acl-acl-toyota-4-1452-1587cc-1980-83-engine-crankshaft-main-bearing-set-t14-632329
Price: 20.95 USD
Availability: BackOrder

Question 1

What does it mean when bearings are 'undersize'?

Accepted Answer

Undersize bearings are manufactured slightly smaller than the standard size. They are typically used when the crankshaft has been machined or ground down during an engine rebuild. Using undersize bearings compensates for the material removed from the crankshaft, maintaining proper oil clearance.

Question 2

What other parts should I replace when replacing the main bearings?

Accepted Answer

When replacing main bearings, it's best practice to also replace the connecting rod bearings at the same time. Also inspect the crankshaft for wear or damage, and consider having it professionally machined if necessary. Always use new bolts and the correct torque specifications when reassembling the engine.

Question 3

How do I know if I need standard size or undersize bearings?

Accepted Answer

If your crankshaft has been machined, measure the rod journal diameter with a micrometer. Subtract that measurement from the original factory specification. The difference will tell you how much undersize you need (e.g., 0.010", 0.020", etc.). If the crank is still at the original factory size, use standard bearings.

Specifications

ACL Toyota 4 1452-1587cc 1980-83 Engine Crankshaft Main Bearing Set

Key Features

Specifications

Frequently Asked Questions

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