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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 Assemble (LLT) >> Assemble Procedures

Assemble 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 Threaded Plugs and Cylinder Head
    GM1977967Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice .
  1. Install the cylinder head coolant threaded plugs.

    Tighten:  Tighten the cylinder head coolant threaded plug to 31 N.m (23 lb ft).

    2. Fig 2: View of Plugs and Cylinder Head
    GM1977963Courtesy of GENERAL MOTORS CORP.
  2. Install the NEW cylinder head oil gallery expansion plugs.
    3. Fig 3: View of Tool EN 46116 and Cylinder Head
    GM1977962Courtesy of GENERAL MOTORS CORP.
  3. Place the valve stem oil seals onto the guides.
    4. IMPORTANT: NEVER reuse a valve stem oil seal. Always use new seals when assembling the cylinder head.
  4. Mount a new valve stem oil seal using the EN 46116  . See Special Tools .
    5. IMPORTANT: Force should only be applied to the valve spring contact area of the new valve stem oil seal during installation.
  5. Push and twist the valve stem oil seal into position on the valve guide until the seal positively locks on the guide using the EN 46116  . See Special Tools .
  6. Lubricate the valve stem and valve guide ID with clean engine oil GM P/N 12345501 (Canadian P/N 992704) or equivalent.
    7. Fig 4: View of Oil Seal and Valve Guide
    GM1977960Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: The valve stem oil seal must not come loose from the valve guide when the valve is installed.
  7. Insert the valve into the valve guide until it bottoms on the valve seat.
    8. Fig 5: View of Valve Spring and Cylinder Head
    GM1977958Courtesy of GENERAL MOTORS CORP.
  8. Position the valve spring on the spring seat.
  9. Place the valve spring retainer onto the valve spring.
    10. Fig 6: View of Tool J 8062
    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.
  10. Compress the valve spring using the J 8062  and the EN 46119  . See Special Tools .
    11. Fig 7: View Valve Keepers With EN 46117
    GM1210911Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Ensure proper directional placement of valve keepers in the EN 46117  . See Special Tools . The valve keepers must be installed with the tapered end towards the valve stem seal.
  11. With the spring compressed, install the valve keepers into the EN 46117  . See Special Tools .
    12. Fig 8: View of Keeper and Tool EN 46119
    GM1977949Courtesy of GENERAL MOTORS CORP.
  12. Place the keepers into position by pushing the tool downward and releasing tension on the EN 46119  and the J 8062  . See Special Tools .
  13. Verify that the valve keepers are installed by placing a rag over the valve tip and tapping with a dead-blow hammer.
    14. Fig 9: View of Temperature Sensor and Cylinder Head
    GM1977948Courtesy of GENERAL MOTORS CORP.
  14. Install the engine coolant temperature (ECT) sensor. - LH Cylinder Head

    Tighten:  Tighten the ECT sensor to 22 N.m (16 lb ft).

  15. Install the fuel rail with injectors into the cylinder head evenly.
  16. Hand tighten the two outer fuel rail bolts to seat the injector in the injector bores.
  17. Start and hand tighten the remaining fuel rail bolts.

    Tighten: 

    1. Tighten the fuel rail bolts in sequence to 22 N.m (16 lb ft).
    2. Tighten the fuel rail bolts in sequence a second time to 22 N.m (16 lb ft).

    18. Fig 10: View of Cylinder Head
    GM1977944Courtesy of GENERAL MOTORS CORP.
  18. Lubricate the high pressure fuel pump cylinder head bore with 5W30 engine oil.
    19. IMPORTANT: Ensure that the high pressure fuel pump roller lifter is oriented properly, the camshaft is at base circle and the number 1 piston is at top dead center (TDC) on the exhaust stroke. The distance from the mounting flange surface to the camshaft at base circle should be 52 mm (2.05 in).
  19. Lubricate the high pressure fuel pump roller lifter with 5W30 engine oil and install into the cylinder head bore.
    20. Fig 11: View of Fuel Pressure, Gasket and Cylinder Head
    GM1977940Courtesy of GENERAL MOTORS CORP.
  20. Install a NEW high pressure fuel pressure fuel pump gasket.
  21. Install a NEW high pressure fuel pump O-ring.
    22. IMPORTANT: Ensure the plastic bolt retainers are installed in the high pressure fuel pump mounting holes before installing.
  22. Install the high pressure fuel pump.
  23. Start and hand-tighten the high pressure fuel pump bolts evenly.

    Tighten:  Tighten the high pressure fuel pump bolts evenly to 15 N.m (11 lb ft).

    24. Fig 12: View of Fuel Line and Cylinder Head
    GM1977939Courtesy of GENERAL MOTORS CORP.
  24. Install and hand-tighten both ends of the NEW high pressure fuel line.

    Tighten:  Tighten the high pressure fuel line fitting nuts to 30 N.m (22 lb ft).

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