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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1497 (Engine Mechanical - 4.2L) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Piston and Connecting Rod Disassemble

Piston and Connecting Rod Disassemble

WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

Tools Required 

J 43654  Piston Pin Retainer Clip Remover/Installer

CAUTION: Handle the piston carefully. Worn piston rings are sharp and may cause bodily injury.
IMPORTANT: Do not reuse the piston rings.
  1. Remove the piston rings using a piston ring expander.
    Fig 1: Removing Piston Rings Using Piston Ring Expander
    G02128720Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Two retainers hold the piston pins in place. Reuse the retainers if they are not damaged during removal.
  2. Remove the piston pin retaining clips.
    Fig 2: Removing Piston Pin Retaining Clips
    G02128721Courtesy of GENERAL MOTORS CORP.
  3. Remove the piston pin.
    Fig 3: Removing Piston Pin
    G02128722Courtesy of GENERAL MOTORS CORP.