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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 387 (Engine Mechanical - 5.3L, 6.0L & 6.2L - Repair Instructions - Off Vehicle) >> Repair Instructions - Off Vehicle >> Piston, Connecting Rod, and Bearing Removal

Piston, Connecting Rod, and Bearing Removal

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Special Tools

    Fig 1: Removing Cylinder Bore Ring Ridge
    GM11497Courtesy of GENERAL MOTORS CORP.
  1. Use the J 24270  cylinder bore ridge reamer in order to remove the cylinder bore ring ridge, if required.
    1. Turn the crankshaft until the piston is at the bottom of the stroke.
    2. Place a cloth on top of the piston.
    3. Use the J 24270  cylinder bore ridge reamer, or equivalent, in order to remove a cylinder ring ridge.
    4. Turn the crankshaft so the piston is at the top of the stroke.
    5. Remove the cloth.
    6. Remove the cutting debris from the cylinder and piston.
  2. Fig 2: Marking Piston Connecting Rod
    GM1552546Courtesy of GENERAL MOTORS CORP.
  3. Using a paint stick or etching tool, place matchmarks or numbers on the connecting rods and the connecting rod caps. The connecting rods and caps MUST be assembled to their original position and direction.
    • A stamping mark on the side of the connecting rod, at the crankshaft journal, may affect component geometry.
    • Mark the top of the piston to the specific cylinder bore.
  4. Fig 3: Connecting Rod Bolt, Cap And Bearing
    GM1552547Courtesy of GENERAL MOTORS CORP.
    IMPORTANT:

    Mark, sort, or organize the connecting rod bearings so they may be installed to their original position and location. The connecting rods and the bearing caps are NOT interchangeable. Refer to Separating Parts .

  5. Remove the connecting rod bolts (102), cap (103) and bearing (104).
  6. Fig 4: Connecting Rod Assembly And Guide
    GM1552499Courtesy of GENERAL MOTORS CORP.
  7. Install the J 41556  connecting rod guide to the connecting rod.
  8. Fig 5: Piston, Connecting Rod And Cylinder Bore
    GM1552548Courtesy of GENERAL MOTORS CORP.
  9. Using a hammer, tap lightly on the end of the J 41556  connecting rod guide in order to remove the piston and connecting rod assembly from the cylinder bore.
  10. Remove the J 41556  connecting rod guide.
  11. Fig 6: Piston, Connecting Rod And Connecting Rod Bearing
    GM1552501Courtesy of GENERAL MOTORS CORP.
  12. Upon removal of the piston and connecting rod assembly, assemble the connecting rod cap and bolts onto the matching connecting rod.