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Home >> Chevrolet >> 2006 >> Cobalt LTZ >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (Engine Mechanical - 2.0L) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Cylinder Head Disassemble >> Disassembly Procedure

Disassembly Procedure

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Identifying Cylinder Head Air Bleed Tube
    GM1451050Courtesy of GENERAL MOTORS CORP.
  1. Remove the engine coolant temperature sensor.
    2. Fig 2: Identifying Valve Spring Retainers
    GM412474Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Ensure that the valve train components are kept together and identified in order for proper re-installation in their original position.
  2. Using the J 8062  and the J 43963  , compress the valve spring. See Special Tools .
  3. Remove the valve keys.
  4. Slowly release the J 8062  and the J 43963  from the valve spring assembly. See Special Tools .
  5. Remove the retainer.
    6. Fig 3: View Of Valve Springs
    GM412475Courtesy of GENERAL MOTORS CORP.
  6. Remove the spring.
    7. Fig 4: View Of Valve Seals
    GM412476Courtesy of GENERAL MOTORS CORP.
    NOTE: Do not damage the valve guide. Remove any burrs that have formed at the key groove by chamfering the valve stem with an oil stone or a file.
  7. Remove the valve seal. Use the J 36017  . Do not reuse. See Special Tools .
    8. Fig 5: Identifying Engine Valves
    GM412477Courtesy of GENERAL MOTORS CORP.
  8. Remove the valve.
  9. Remove the remaining valves.
    10. Fig 6: View Of Cylinder Head Plugs
    GM412478Courtesy of GENERAL MOTORS CORP.
  10. Remove the cylinder head plugs.
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