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King Engine Bearings CR4021SI0.75 SI-Series Connecting Rod Bearing Set Undersize - 0.75mm

(2000-2004 Ford Focus; 1986-2002 Ford Escort; 1986-1988 Ford EXP; 1991-1999 Mercury Tracer; 1986-1987 Mercury Lynx)

Part of: King Engine Bearings SI-Series Connecting Rod Bearing Set

Other options in this family: King Engine Bearings CR6826SI1.0 King Engine Bearings CR642SI020 King Engine Bearings CR527SI020 King Engine Bearings CR6751SI King Engine Bearings CR814SI020

Manufacturer

Picture for manufacturer King Engine Bearings

Part Number

CR4021SI0.75
14 reviews
Sale Price

$16.78

Estimated ship date Monday, November 23

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Product Details

The King Engine Bearings CR4021SI0.75 is a SI-Series connecting rod bearing set designed for the Ford Escort equipped with the 1.9L engine (1987–1989). This set is machined to a 0.75mm undersize specification, making it the correct choice during engine rebuilds where crankshaft journals have been ground to restore proper geometry and surface finish.

King's SI-Series bearings are constructed using a bimetal aluminum-silicon base material — an alternative to traditional tri-metal construction. This Alecular alloy consists of aluminum, tin, copper, and other metals applied in a single deep layer over a steel backing, delivering excellent embedability and resistance to wear under normal street operating conditions.

Key Features:

  • SI-Series bimetal construction — aluminum-silicon alloy on steel backing for durability and embedability
  • 0.75mm undersize — engineered for use with journals ground 0.75mm under standard dimension
  • "Bull's Eye" wall thickness tolerance — bearing wall thickness held to ±0.0001", tighter than industry standard
  • Precision-fit design — consistent shell-to-shell dimensions ensure proper oil clearance and reliable seating
  • OEM-quality replacement suitable for engine rebuilds and overhauls

King Engine Bearings has specialized exclusively in engine bearings since 1960, applying engineering insights from motorsport to their full OE-replacement catalog. The CR4021SI0.75 delivers the dimensional accuracy and material quality expected of a professional engine rebuild component.

Products specifications

Fits

2000-2004 Ford Focus; 1986-2002 Ford Escort; 1986-1988 Ford EXP; 1991-1999 Mercury Tracer; 1986-1987 Mercury Lynx

Material

bimetal (aluminum silicon base)

Undersize

0.75

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