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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1063 (Engine Mechanical - 4.3L) >> Repair Instructions - On Vehicle >> Cylinder Head Replacement - Right Side >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2008 GMC Sierra and 2008 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Cylinder Head Dowel Pin Measurement
    GM334314Courtesy of GENERAL MOTORS CORP.
  1. Assemble the cylinder head, if necessary. Refer to Cylinder Head Assemble .
  2. Install the cylinder head locator pins, if necessary.
    3. Fig 2: View Of Cylinder Head Gasket And Alignment Pins - Right
    GM334312Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Do not use any type of sealer on the cylinder head gasket.
  3. Install a NEW cylinder head gasket.
    4. Fig 3: Removing/Installing Cylinder Head (Right)
    GM480538Courtesy of GENERAL MOTORS CORP.
  4. Install the cylinder head.
    5. Fig 4: Locating Cylinder Head Bolts (Right)
    GM480537Courtesy of GENERAL MOTORS CORP.
  5. Apply sealant to the threads of the NEW  cylinder head bolts. Refer to Sealers, Adhesives, and Lubricants  for the correct part number.
  6. Install the cylinder head bolts finger tight.
    7. Fig 5: Cylinder Head Bolt Tightening Sequence
    GM5132Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice .
  7. Tighten the cylinder head bolts using the sequence shown.

    Tighten: 

    • Tighten the bolts a first pass to 30 N.m (22 lb ft).
    • Tighten the long bolts (1, 4, 5, 8, 9) a final pass to 75 degrees using J 45059  . See Special Tools .
    • Tighten the medium bolts (12, 13) a final pass to 65 degrees using J 45059  . See Special Tools .
    • Tighten the short bolts (2, 3, 6, 7, 10, 11) a final pass to 55 degrees using J 45059  . See Special Tools .

    8. Fig 6: Spark Plug Wire Support
    GM328590Courtesy of GENERAL MOTORS CORP.
  8. Install the spark plug wire support and bolts.

    Tighten:  Tighten bolts to 12 N.m (106 lb in).

    9. Fig 7: Locating Spark Plugs
    GM328586Courtesy of GENERAL MOTORS CORP.
  9. Install the spark plugs.
  10. If installing NEW spark plugs measure for the correct gap. Adjust the spark plug gap, if necessary.

    Specification:  Spark plug gap to 1.52 mm (0.060 in).

    Tighten: 

    • Tighten the plugs on a USED cylinder head to 15 N.m (11 lb ft).
    • Tighten the plugs on the initial installation of a NEW cylinder head to 30 N.m (22 lb ft).

    11. Fig 8: View Of Generator Bracket Stud
    GM475837Courtesy of GENERAL MOTORS CORP.
  11. Install the generator bracket stud.

    Tighten:  Tighten the stud to 20 N.m (15 lb ft).

  12. Install the right pushrods. Refer to Valve Rocker Arm and Push Rod Replacement .
  13. Install the exhaust manifold. Refer to Exhaust Manifold Replacement - Right Side (4.3L) .
  14. Install the intake manifold. Refer to Lower Intake Manifold Replacement .
  15. Install the generator bracket. Refer to Generator Bracket Replacement (4.3L) .
  16. Fill the cooling system. Refer to Cooling System Draining and Filling (Vac-N-Fill) or Cooling System Draining and Filling (Static Fill) .
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