What does the 0.75mm undersize mean for these bearings?

The 0.75mm undersize indicates that these bearings are designed for a crankshaft that has been machined down by 0.75mm. This is a common practice during engine rebuilds when the original crankshaft journals have wear or damage that needs to be corrected.

What are the symptoms of worn connecting rod bearings?

Worn connecting rod bearings often produce a distinct knocking or rattling sound from the engine, especially when it's under load or at idle. Ignoring these symptoms can lead to severe engine damage.

Do I need to replace all the connecting rod bearings when I install these?

Yes, it is highly recommended to replace all connecting rod bearings on all connecting rods when performing an engine rebuild or repair. This ensures even wear and consistent performance across the crankshaft.

ACL Mazda 4 1998-2184cc 1983-93 Engine Connecting Rod Bearing Set

Specifications

Brand: ACL
Part #: 4B2130A-.75

ACL Mazda 4 1998-2184cc 1983-93 Engine Connecting Rod Bearing Set

Name: ACL Mazda 4 1998-2184cc 1983-93 Engine Connecting Rod Bearing Set
Brand: ACL
SKU: acl-acl-mazda-4-1998-2184cc-1983-93-engine-connecting-rod-bearing-set-t14-633095
Price: 10.85 USD
Availability: BackOrder

$10.85

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Fits 1983-1993 Mazda B2200. ACL connecting rod bearings are a direct replacement for worn engine components.

Key Features

Fits 1983-1993 Mazda B2200, 1983-1991 Mazda 626, and 1988-1992 Mazda MX-6.
This is a set of connecting rod bearings, crucial for reducing friction between the crankshaft and connecting rods.
The bearings are 0.75mm undersize, intended for use with a crankshaft that has been machined to match.
ACL is a well-known manufacturer of engine bearings.
Direct replacement for worn or damaged engine bearings.

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Fits these vehicles

Mazda 626 1983, 1988-1991
Mazda B2200 1987-1993
Mazda MX-6 1988-1992

Product Details

You get a full set of connecting rod bearings in this kit, which means one box handles the whole engine rebuild or repair. These ACL bearings are made to replace the original ones in your 1983-1993 Mazda B2200, 1983-1991 Mazda 626, or 1988-1992 Mazda MX-6. Connecting rod bearings are crucial for your engine’s health; they sit between the crankshaft and the connecting rod, reducing friction and wear as the rod spins. When these bearings wear out, you might hear a knocking sound from the engine, and it can lead to serious internal damage if not addressed.

ACL has been making engine bearings for a long time, and these are well-built replacements designed to meet the original specifications. They are sized at 0.75mm undersize, meaning they are intended for use when the crankshaft journals have been machined down by 0.75mm during an engine rebuild. This specific sizing ensures a proper fit and oil clearance, which is critical for lubricating and cooling the bearing surfaces. Installing these bearings is a key step in ensuring your engine runs smoothly and lasts for many more miles.