GM Service Manual Online
For 1990-2009 cars only

Cylinder Head Disassemble 6.2L

Tools Required

J 8062 Valve Spring Compressor - Head Off


    Object Number: 260151  Size: SH

    Important: 

       • With the components at room temperature, remove the spark plugs from the cylinder head.
       • Mark, organize, or sort the cylinder head components for assembly. Return the components to their original location during assembly.

  1. Remove the spark plugs from the cylinder heads.
  2. Use the J 8062 in order to compress the valve spring.

  3. Object Number: 1559870  Size: SH
  4. Remove the valve stem keys (225).
  5. Remove the valve spring cap (224).
  6. Remove the valve spring (223).
  7. Remove the valves (228).
  8. Remove the valve stem oil seal (222). Refer to Separating Parts .

  9. Object Number: 1559873  Size: SH
  10. Remove the cylinder head core hole plugs (216), as required.

  11. Object Number: 1559875  Size: SH
  12. Remove the coolant temperature sensor (725) from the left cylinder head.

  13. Object Number: 1559878  Size: SH
  14. Remove the cylinder head plug (229) from the right cylinder head.

  15. Object Number: 2046466  Size: SH
  16. Inspect for a leaking plug. Second design applications use a rivet-type plug at the top rear coolant passage of each cylinder head. If service of a leaking plug is required, it is necessary to remove the cylinder head from the engine to properly remove the plug.

  17. Object Number: 2060115  Size: SH
  18. Using a 6.43 mm (0.25 in) or smaller punch, remove the plug assembly from the cylinder head.

  19. Object Number: 1408862  Size: SH
  20. If plug removal is required, install a first design coolant air bleed cover and bolt to complete the repair.

Cylinder Head Disassemble 7.0L

Tools Required

J 8062 Valve Spring Compressor - Head Off


    Object Number: 260151  Size: SH

    Important: 

       • With the components at room temperature, remove the spark plugs from the cylinder head.
       • Mark, organize, or sort the cylinder head components for assembly. Return the components to their original location during assembly.

  1. Remove the spark plugs from the cylinder heads.
  2. Use the J 8062 in order to compress the valve spring.

  3. Object Number: 1552463  Size: SH
  4. Remove the intake valve rocker arm wear pads (234).
  5. Remove the valve stem keys (225).
  6. Remove the valve spring cap (224).
  7. Remove the valve spring (223).
  8. Remove the valves (227).
  9. Remove the valve stem oil seal (222). Refer to Separating Parts .

  10. Object Number: 1552454  Size: SH
  11. Remove the coolant temperature sensor from the left cylinder head.

  12. Object Number: 1552455  Size: SH
  13. Remove the cylinder head plug (229) from the right cylinder head.

  14. Object Number: 2046466  Size: SH
  15. Inspect for a leaking plug. Second design applications use a rivet-type plug at the top rear coolant passage of each cylinder head. If service of a leaking plug is required, it is necessary to remove the cylinder head from the engine to properly remove the plug.

  16. Object Number: 2060115  Size: SH
  17. Using a 6.43 mm (0.25 in) or smaller punch, remove the plug assembly from the cylinder head.

  18. Object Number: 1408862  Size: SH
  19. If plug removal is required, install a first design coolant air bleed cover and bolt to complete the repair.