What does 1.0mm oversize mean for these bearings?

This means the bearings are thicker by 1.0mm than standard size. They are designed to be used when the crankshaft's connecting rod journals have been machined down by 1.0mm to remove wear or damage, restoring proper oil clearance.

What is the construction of these connecting rod bearings?

These bearings are made with a bimetal construction, featuring an aluminum silicon base. This material is chosen for its ability to handle the high loads and rotational forces found in the connecting rod journal area.

Do I need to replace the crankshaft when using these bearings?

These are oversize bearings, so they are intended for use when the crankshaft journals have been machined down by 1.0mm. If your crankshaft journals are still within standard specifications, you would need standard size bearings instead.

Specifications

Brand: King Engine Bearings
Part #: CR4021SI1.0
UPC: 611500429316

King Engine Bearings Escort 1.9 1987/89 (Size +1.0mm) Connecting Rod Bearing Set

Name: King Engine Bearings Escort 1.9 1987/89 (Size +1.0mm) Connecting Rod Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-escort-1-9-1987-89-size-1-0mm-connecti-t14-769513
Price: 18.47 USD
Availability: BackOrder

$18.47

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Fits 1986-2002 Ford Escort. King Engine Bearings connecting rod bearing set, 1.0mm oversize, for engine rebuilds.

Key Features

Fits 1986-2002 Ford Escort, 1986-1988 Ford EXP, 2000-2004 Ford Focus, 1986-1987 Mercury Lynx, and 1991-1999 Mercury Tracer.
Set of connecting rod bearings for engine rebuilding applications.
Features a bimetal construction with an aluminum silicon base for durability.
This set is 1.0mm oversize, intended for use with machined crankshaft journals.

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About this part

Product Details

If you're rebuilding the engine in your 1986-2002 Ford Escort, especially the 1.9L models from 1987-1989, new connecting rod bearings are a critical part of the job. These bearings sit between the connecting rod and the crankshaft, allowing the rod to spin smoothly while handling the immense forces from combustion. Worn bearings can lead to excessive noise, oil pressure loss, and eventually, catastrophic engine failure.

This set from King Engine Bearings uses a bimetal construction with an aluminum silicon base. This material is well-suited for the demands of a connecting rod journal, offering good wear resistance and load-carrying capacity. Since these bearings are 1.0mm oversize, they are intended for use when the crankshaft journals have been machined down by 1.0mm to clean up any wear or damage. Using the correct size bearing is essential for proper oil clearance, which is key to engine longevity.