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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 638 (Engine Mechanical - 4.0L (Unit Repair)) >> Repair Instructions >> Piston and Connecting Rod Disassemble

Piston and Connecting Rod Disassemble

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora and 2001 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: You must use a piston ring expander to remove and install the piston rings. Only expand the rings far enough to fit over the piston lands. If the rings are overexpanded, the top ring will shatter and the others will distort.
  1. Remove the piston rings using a piston ring expander. Place each ring in a clean shop towel for storage.
    Fig 1: Removing Piston Rings
    G01815853Courtesy of GENERAL MOTORS CORP.

    Important:  Be careful not to nick or gouge the piston or the retaining ring groove with the screwdriver if you plan to reuse the piston.

  2. Using a small screwdriver, pry out the piston pin retainers by using the removal access notch in the side of the piston.
  3. Discard the old piston pin retainers.
    Fig 2: Prying Out Piston Pin Retainers
    G01815854Courtesy of GENERAL MOTORS CORP.
  4. Slide the piston pin (4) out of the piston. The piston will disconnect from the connecting rod (2).
    Fig 3: Removing Piston Pin
    G01815855Courtesy of GENERAL MOTORS CORP.
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