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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 161 (Engine Mechanical - 4.8L, 5.3L, 6.0L And 6.2L (4 Of 5)) >> Off-Vehicle Repair Instructions (2 Of 3) >> Cylinder Head Disassemble >> Tools Required

Tools Required

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J 8062  Valve Spring Compressor - Head Off. See Special Tools .

    Fig 1: Compressing Valve Spring Using J 8062
    GM260151Courtesy of GENERAL MOTORS CORP.
    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. See Special Tools .
    3. Fig 2: View Of Valve Components
    GM1559870Courtesy of GENERAL MOTORS CORP.
  3. Remove the valve stem keys (225).
  4. Remove the valve spring cap (224).
  5. Remove the valve spring (223).
  6. Remove the valves (228).
  7. Remove the valve stem oil seal (222). Refer to Separating Parts .
    8. Fig 3: Locating Cylinder Head Core Hole Plug
    GM1559873Courtesy of GENERAL MOTORS CORP.
  8. Remove the cylinder head core hole plugs (216), as required.
    9. Fig 4: Locating Coolant Temperature Sensor
    GM1559875Courtesy of GENERAL MOTORS CORP.
  9. Remove the coolant temperature sensor (725) from the left cylinder head.
    10. Fig 5: Locating Coolant Plug
    GM1559878Courtesy of GENERAL MOTORS CORP.
  10. Remove the cylinder head plug (229) from the right cylinder head.
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