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Home >> Chevrolet >> 2006 >> Silverado 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1162 (Engine Mechanical - 3.6L (4 Of 6)) >> Off-Vehicle Repair Instructions (2 Of 4) >> Cylinder Head Disassemble (LLT) >> Disassemble Procedures

Disassemble Procedures

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View of Fuel Line and Cylinder Head
    GM1977939Courtesy of GENERAL MOTORS CORP.
  1. Remove and discard high pressure fuel line. - LH Cylinder Head
    2. Fig 2: View of Fuel Pump Bolts and Cylinder Head
    GM1977940Courtesy of GENERAL MOTORS CORP.
  2. Remove and discard high pressure fuel pump bolts (1). - LH Cylinder Head
  3. Remove the high pressure fuel pump (2). - LH Cylinder Head
  4. Remove and discard the high pressure fuel pump gasket (3). - LH Cylinder Head
  5. Remove and discard the high pressure fuel pump O-ring (4). - LH Cylinder Head
    6. Fig 3: View of Fuel Rail, Bolts and Cylinder Head
    GM1977944Courtesy of GENERAL MOTORS CORP.
  6. Remove the fuel rail bolts.
  7. Remove the fuel rail and injectors.
    8. Fig 4: Identifying Hold-Down Clamp on Cylinder Head
    GM1977946Courtesy of GENERAL MOTORS CORP.
  8. The injectors may stay in the cylinder head. Remove the fuel injector hold-down clamp before removing the injector.
  9. Use the J-37281-A  and the J 2619-01  to remove the injector.
    10. Fig 5: View of Engine Coolant Temperature Sensor & Cylinder Head
    GM1977948Courtesy of GENERAL MOTORS CORP.
  10. Remove the engine coolant temperature (ECT) sensor. - LH Cylinder Head
    11. Fig 6: View of Retainer and Valves
    GM1977949Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Ensure valve heads will not contact anything during the following step in order to avoid bending or damage.
  11. Using an appropriately sized deep socket and a plastic hammer, lightly tap on the valve spring retainer to loosen the valve keepers.
    12. Fig 7: View of Compressor and Valve Springs
    GM1977952Courtesy of GENERAL MOTORS CORP.
    CAUTION: Compressed valve springs have high tension against the valve spring compressor. Valve springs that are not properly compressed by or released from the valve spring compressor can be ejected from the valve spring compressor with intense force. Use care when compressing or releasing the valve spring with the valve spring compressor and when removing or installing the valve stem keys. Failing to use care may cause personal injury.
    NOTE: Do not compress the valve springs less than 24.0 mm (0.943 in). Contact between the valve spring retainer and the valve stem oil seal can cause potential valve stem oil seal damage.
  12. Compress the valve spring using the J 8062  and the EN 46119  . See Special Tools .
    13. Fig 8: View of Tool EN 46117 and Valve Keepers
    GM1977955Courtesy of GENERAL MOTORS CORP.
  13. Use the magnet of the EN 46117  in order to remove the valve keepers. See Special Tools .
  14. Remove the valve spring compressor and the adapter.
    15. Fig 9: View of Valve Spring Retainer Assembly
    GM1977958Courtesy of GENERAL MOTORS CORP.
  15. Remove the valve spring retainer.
  16. Remove the valve spring.
    17. Fig 10: View of Valve and Cylinder Head
    GM1977960Courtesy of GENERAL MOTORS CORP.
  17. Remove the valve.
    18. Fig 11: View of EN 46116 and Valve
    GM1977962Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: NEVER reuse a valve stem oil seal.
  18. Remove the valve stem oil seal using the EN 46116  and discard. See Special Tools .
  19. Repeat these procedures for the remaining valves.
    20. Fig 12: Identifying Expansion Plugs and Cylinder Head
    GM1977963Courtesy of GENERAL MOTORS CORP.
  20. Remove the cylinder head oil gallery expansion plugs.
    21. Fig 13: View of Coolant Threaded Plugs and Cylinder Head
    GM1977967Courtesy of GENERAL MOTORS CORP.
  21. Remove the cylinder head coolant threaded plugs.
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