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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1392 (Engine Mechanical - 4.3L) >> Repair Instructions - Off Vehicle >> Cylinder Head Installation - Left Side >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2009 GMC Sierra and 2009 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Left Side Cylinder Head Locator Dowel Pins Proper Installation Position
    GM859876Courtesy of GENERAL MOTORS CORP.
  1. Clean the cylinder head gasket surfaces on the engine block.
  2. Inspect the cylinder head locator dowel pins for proper installation.

    The installation height should be 6.3-6.5 mm (0.248-0.256 in) (a).

  3. Clean the cylinder head gasket surfaces on the cylinder head.
    4. Fig 2: View Of Cylinder Head Gasket And Alignment Pins - Left
    GM334299Courtesy of GENERAL MOTORS CORP.
    NOTE: Do not use any type sealer on the cylinder head gasket, unless specified.
  4. Install the NEW cylinder head gasket in position over the cylinder head locator dowel pins.
    5. Fig 3: View of Cylinder Head (Left)
    GM480536Courtesy of GENERAL MOTORS CORP.
  5. Install the cylinder head onto the engine block.

    Guide the cylinder head carefully into place over the dowel pins and the cylinder head gasket.

    6. Fig 4: Locating Cylinder Head Bolts (Left)
    GM480533Courtesy of GENERAL MOTORS CORP.
  6. Apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent, to the threads of the NEW cylinder head bolts.
  7. Install the NEW cylinder head bolts finger tight.
    8. Fig 5: Identifying Cylinder Head Bolt Tightening Sequence
    GM5132Courtesy of GENERAL MOTORS CORP.
    CAUTION: Refer to Fastener Caution .
  8. Tighten the cylinder head bolts in sequence on the first pass. Tighten the bolts in sequence on the first pass to 30 N.m (22 lb ft).
  9. Use the J 45059:  meter in order to tighten the cylinder head bolts in sequence on the final pass.
    1. Tighten the long bolts (1, 4, 5, 8, and 9) on the final pass in sequence to 75 degrees.
    2. Tighten the medium bolts (12 and 13) on the final pass in sequence to 65 degrees.
    3. Tighten the short bolts (2, 3, 6, 7, 10, and 11) on the final pass in sequence to 55 degrees.
    10. Fig 6: Locating Spark Plug Wire Support
    GM328588Courtesy of GENERAL MOTORS CORP.
  10. Install the spark plug wire support and bolts and tighten to 12 N.m (106 lb in).
    11. Fig 7: View Of Spark Plugs (Left)
    GM328582Courtesy of GENERAL MOTORS CORP.
  11. Measure the spark plugs for the proper gap.

    Adjust the spark plug gap if necessary.

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

  12. Install the spark plugs and tighten to 15 N.m (11 lb ft).
    13. Fig 8: View Of Engine Coolant Temperature Gage Sensor
    GM387767Courtesy of GENERAL MOTORS CORP.
  13. If reusing the engine coolant temperature gage sensor, if applicable, apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent, to the threads of the engine coolant temperature gage sensor.
  14. Install the engine coolant temperature gage sensor, if applicable. Tighten the engine coolant temperature gage sensor to 20 N.m (15 lb ft).
    15. Fig 9: View Of Engine Coolant Temperature Sensor
    GM387769Courtesy of GENERAL MOTORS CORP.
  15. If reusing the engine coolant temperature sensor, if applicable, apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent, to the threads of the engine coolant temperature gage sensor.
  16. Install the engine coolant temperature sensor, if applicable. Tighten the engine coolant temperature sensor to 20 N.m (15 lb ft).
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