Name: ACL Mazda 4 1991cc FS 1993-02 Engine Connecting Rod Bearing Set
Brand: ACL
SKU: acl-acl-mazda-4-1991cc-fs-1993-02-engine-connecting-rod-bearing-set-t14-630908
Price: 22.86 USD
Availability: BackOrder

Question 1

What does 'undersize' mean?

Accepted Answer

When an engine is rebuilt, the crankshaft journals may be machined to remove damage. This makes the journal slightly smaller, requiring undersized bearings to maintain the correct oil clearance. These bearings are 0.25mm smaller than the standard size.

Question 2

How do I know if I need undersized bearings?

Accepted Answer

If you are rebuilding your engine, measure the crankshaft journals after machining. Your machinist will be able to tell you what size bearings you need to achieve the correct oil clearance. Always refer to the engine manufacturer's specifications.

Question 3

What happens if I use the wrong size bearings?

Accepted Answer

Using the wrong size bearings can cause serious engine damage. If the bearings are too tight, they can overheat and seize. If they are too loose, you may experience low oil pressure and excessive wear. Always plastigage your bearings to ensure proper clearance.

Specifications

ACL Mazda 4 1991cc FS 1993-02 Engine Connecting Rod Bearing Set

Key Features

Specifications

Frequently Asked Questions

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