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Home >> Cadillac >> 2012 >> Escalade EXT >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 5.3L, 6.0L, 6.2L - Repair Instructions - Off Vehicle >> Repair Instructions - Off Vehicle >> Cylinder Head Assemble

Cylinder Head Assemble

Special Tools 

J 8062  Valve Spring Compressor - Head Off

For equivalent regional tools, refer to Special Tools

    Fig 1: Valve Stem Keys, Valve Spring Cap & Valve Spring
    GM1559870Courtesy of GENERAL MOTORS COMPANY
  1. Clean the cylinder head valve spring shim area.
    2. NOTE:

    When using the valves and related components again, install the parts to their original location.

  2. Install the valves (228) into the proper port. Refer to Separating Parts
  3. Install a NEW valve stem oil seal (222).
  4. Install the valve spring (223).
  5. Install the valve spring cap (224).
    6. Fig 2: Compressing Valve Spring Using
    GM260151Courtesy of GENERAL MOTORS COMPANY
  6. Using the J 8062  spring compressor, compress the valve spring.
  7. Install the valve stem keys.
    1. Use grease in order to hold the keys in place and remove the J 8062  spring compressor.
    2. Ensure the keys seat properly in the groove of the valve stem.
    3. Tap the end of the valve stem with a plastic face hammer to seat the keys, if necessary.
    8. Fig 3: Measuring Valve Spring Installed Height
    GM64315Courtesy of GENERAL MOTORS COMPANY
  8. After installation, measure the valve spring installed height.

    Measure from the base of the valve spring to the top of the valve spring. If the spring installed height is not within specification, the valve and/or cylinder head must be replaced. Refer to Engine Mechanical Specifications (RPO LMG VIN 0) , Engine Mechanical Specifications (RPO L9H) , Engine Mechanical Specifications (RPO L94 VIN F) , Engine Mechanical Specifications (RPO L96 VIN G) , Engine Mechanical Specifications (RPO LC9 VIN 7)

  9. Install the remaining valves, springs, and other components.
    10. Fig 4: Locating Coolant Temperature Sensor
    GM1559875Courtesy of GENERAL MOTORS COMPANY
  10. Install sealant GM P/N 12346004 (Canadian P/N 10953480), or equivalent, to the threads of the coolant temperature sensor (725).
    11. CAUTION:

    Refer to Fastener Caution

  11. Install the coolant temperature sensor into the left cylinder head and tighten to 20 N.m (15 lb ft).
    12. Fig 5: Locating Coolant Plug
    GM1559878Courtesy of GENERAL MOTORS COMPANY
  12. Install sealant GM P/N 12346004 (Canadian P/N 10953480), or equivalent, to the threads of the cylinder head plug (229).
  13. Install the cylinder head plug to the right cylinder head and tighten to 20 N.m (15 lb ft).
    14. Fig 6: Locating Cylinder Head Core Hole Plug
    GM1559873Courtesy of GENERAL MOTORS COMPANY
  14. Apply threadlock GM P/N 12345382 (Canadian P/N 10953489), or equivalent, to the sides of the cylinder head plugs (216).
  15. Install the cylinder head plugs into the cylinder head.

    A properly installed plug should be installed 2.5 mm (0.1 in) below the end face of the head.

    16. Fig 7: Rivet Plug
    GM2215304Courtesy of GENERAL MOTORS COMPANY
  16. Install the rivet plug (1) into a rivet gun.
    17. Fig 8: Illustrating Rivet Installation
    GM2202713Courtesy of GENERAL MOTORS COMPANY
  17. Insert the rivet into the coolant passage of the cylinder head.
  18. Squeezing the handle of the tool, install the rivet.
    19. Fig 9: Rivet-Type Plug
    GM2046466Courtesy of GENERAL MOTORS COMPANY
  19. Inspect for proper installation of the rivet (1).

    A properly installed plug should be installed flush with the surface of the head.

    20. Fig 10: Engine Coolant Air Bleed Cover, Bolts & Seals
    GM1408862Courtesy of GENERAL MOTORS COMPANY
  20. Installation of the first design coolant air bleed cover (313) and bolt (312) may be used instead of the rivet plug to complete the repair. Tighten the coolant air bleed bolts to 12 N.m (106 lb in).
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