Name: ACL Nissan 4 1991-2164cc SD20-SD22 1963-80 Engine Crankshaft Main Bearing Set
Brand: ACL
SKU: acl-acl-nissan-4-1991-2164cc-sd20-sd22-1963-80-engine-crankshaft-main-bearing-se-t14-631746
Price: 43.83 USD
Availability: BackOrder

Question 1

What does '0.25' mean in the part number?

Accepted Answer

The -0.25 suffix indicates this is a 0.25mm / 0.010 inch undersized bearing set. This means the bearing's inner diameter is 0.25mm smaller than the standard size. Undersized bearings are typically used when the crankshaft has been machined.

Question 2

What other parts should I replace when installing new main bearings?

Accepted Answer

When replacing main bearings, it's always a good idea to inspect and/or replace the connecting rod bearings at the same time. Also, consider replacing the crankshaft bolts, as they are often torque-to-yield and should not be reused.

Question 3

How do I determine the correct bearing size for my engine?

Accepted Answer

The correct bearing size depends on the condition of your crankshaft. If the crankshaft journals are within factory specifications, use standard-size bearings. If the journals have been machined undersize, you'll need to use the corresponding undersize bearings.

Specifications

ACL Nissan 4 1991-2164cc SD20-SD22 1963-80 Engine Crankshaft Main Bearing Set

Key Features

Specifications

Frequently Asked Questions

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