What does 'undersize 0.75mm' mean for these bearings?

This means the bearings are manufactured to be 0.75mm smaller in diameter than standard size. This is necessary when the crankshaft journals have been machined down (ground) to this specific undersize dimension during an engine rebuild.

Are these bearings sold individually or as a set?

This product is sold as a set of connecting rod bearings. A complete set is required to replace all bearings on the connecting rods for your engine.

What is the typical application for these bearings?

These bearings are commonly used during engine rebuilds or repairs for 4-cylinder engines, particularly those with 4G63 and 4G64 engine codes, and are sized for a crankshaft that has been machined to a 0.75mm undersize.

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ACL Mitsubishi 4 1997(4G63)-2350cc(4G64) 1992-on Engine Connecting Rod Bearing Set

Specifications

Brand: ACL
Part #: 4B1185A-.75

ACL Mitsubishi 4 1997(4G63)-2350cc(4G64) 1992-on Engine Connecting Rod Bearing Set

Name: ACL Mitsubishi 4 1997(4G63)-2350cc(4G64) 1992-on Engine Connecting Rod Bearing Set
Brand: ACL
SKU: acl-acl-mitsubishi-4-1997-4g63-2350cc-4g64-1992-on-engine-connecting-rod-bearing-t14-631800
Price: 10.36 USD
Availability: BackOrder

$10.36

On Backorder

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

Fits 2001-2006 Kia Optima. ACL connecting rod bearings, undersize 0.75mm, for reliable engine performance.

Key Features

Fits 2001-2006 Kia Optima.
ACL connecting rod bearing set.
Part number 4B1185A-.75.
Undersize 0.75mm for use with machined crankshafts.
Designed for 4-cylinder engines, including 4G63 and 4G64 variants.

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Fits this vehicle

Kia Optima 2001-2006

Product Details

ACL has been making engine bearings for decades, and these connecting rod bearings for your 2001-2006 Kia Optima are one of their staples. Connecting rod bearings are critical for your engine's health, acting as the interface between the crankshaft and the connecting rod. They handle immense pressure and friction, ensuring smooth rotation and proper oil flow. When it's time to rebuild or refresh your engine, especially if you've had the crankshaft machined, using the correct size bearings is essential for optimal performance and longevity.

This set is specifically sized at 0.75mm undersize, which is crucial if your crankshaft journals have been ground down to this dimension during a rebuild. ACL uses well-built materials and manufacturing processes to ensure these bearings can handle the demands of your engine. Proper installation, including ensuring clean oil passages and using the correct torque specifications, is key to getting the most out of these components.