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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Engine Mechanical - 8.1L) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Piston and Connecting Rod Assemble

Piston and Connecting Rod Assemble

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  1. Assemble the right bank pistons and connecting rods with the arrow (1) on the top of the piston facing front of engine and the master or larger flange (2) of the connecting rod facing rear of engine.
    Fig 1: Aligning Piston With Connecting Rod (Right Bank)
    GM1671535Courtesy of GENERAL MOTORS CORP.
  2. Assemble the left bank pistons and connecting rods with the arrow (1) on the top of the piston facing front of engine and the master or larger flange (2) of the connecting rod facing front of engine.
    Fig 2: Aligning Piston With Connecting Rod (Left Bank)
    GM1671536Courtesy of GENERAL MOTORS CORP.
    3. Fig 3: View Of Retaining Clip In Pin Bore Groove
    GM1366372Courtesy of GENERAL MOTORS CORP.
    NOTE: Install the piston pin retainers correctly in the retaining groove during assembly in order to avoid engine damage.
  3. Install the retainer. The retainer should be seated in the groove of the pin bore.
  4. Lubricate the pin and pin bore with clean engine oil.
  5. Install the piston pin to the piston and connecting rod.
    Fig 4: View Of Piston Pin, Piston, Clips & Connecting Rod
    GM35866Courtesy of GENERAL MOTORS CORP.
  6. Install the retainer. The retainer should be seated in the groove of the pin bore. Ensure the pin moves freely within the piston pin bore.
    7. Fig 5: Removing/Installing Piston Rings
    GM490763Courtesy of GENERAL MOTORS CORP.
    NOTE: Use a piston ring expander to install the piston rings. The rings may be damaged if expanded more than necessary.
  7. Using piston ring pliers, install the piston rings onto the piston.
    8. Fig 6: View Of Lower Oil Control Piston Ring Spacer
    GM562836Courtesy of GENERAL MOTORS CORP.
  8. Install the lower oil control piston ring spacer onto the piston.
    9. Fig 7: View Of Lower Oil Control Piston Ring
    GM562842Courtesy of GENERAL MOTORS CORP.
  9. Install the lower oil control piston ring onto the piston (1).
    10. Fig 8: View Of Upper Oil Control Piston Ring
    GM562839Courtesy of GENERAL MOTORS CORP.
  10. Install the upper oil control piston ring onto the piston (1).
    11. Fig 9: View Of Oil Control Piston Rings
    GM562848Courtesy of GENERAL MOTORS CORP.
  11. Position the oil control piston ring end gaps a minimum of 90 degrees apart (1, 2, 3).
    12. Fig 10: View Of Lower Compression Piston Ring Mark
    GM562823Courtesy of GENERAL MOTORS CORP.
  12. Install the lower compression piston ring onto the piston. The mark (1) on the side of the piston ring should face the top of the piston.
    13. Fig 11: View Of Upper Compression Piston Ring Mark
    GM562819Courtesy of GENERAL MOTORS CORP.
  13. Install the upper compression piston ring onto the piston. The mark (1) on the side of the piston ring should face the top of the piston.
  14. Position the compression ring end gaps 120 degrees apart.
    15. Fig 12: Exploded View Of Piston
    GM1523846Courtesy of GENERAL MOTORS CORP.
  15. Install the connecting rod bearings (118) to the rod (119) and cap (117).
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