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Home >> Chevrolet >> 2009 >> Impala LTZ >> Repair and Diagnosis >> External Pages >> Different car >> Section 79 (Engine Mechanical - 3.6L (Ly7) (Repair Instructions -- 3 Of 5)) >> Off-Vehicle Repair Instructions - Part 2 >> Cylinder Head Disassemble >> Disassemble Procedure

Disassemble Procedure

WARNING: This page is about a different car, the 2005 Buick LaCrosse and 2005 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Loosening Valve Keepers
    GM1210820Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Ensure valve heads will not contact anything during the following step in order to avoid bending or damage.
  1. Using an appropriately sized deep socket and a plastic hammer, lightly tap on the valve spring retainer to loosen the valve keepers.
    2. Fig 2: Identifying J 8062 & EN 46119
    GM1210825Courtesy of GENERAL MOTORS CORP.
    CAUTION: Compressed valve springs have high tension against the valve spring compressor. Valve springs that are not properly compressed by or released from the valve spring compressor can be ejected from the valve spring compressor with intense force. Use care when compressing or releasing the valve spring with the valve spring compressor and when removing or installing the valve stem keys. Failing to use care may cause personal injury.
    NOTE: Do not compress the valve springs less than 24.0 mm (0.943 in). Contact between the valve spring retainer and the valve stem oil seal can cause potential valve stem oil seal damage.
  2. Compress the valve spring using the J 8062  and the EN 46119  .
    3. Fig 3: View Of EN 46117
    GM1210829Courtesy of GENERAL MOTORS CORP.
  3. Use the magnet of the EN 46117  in order to remove the valve keepers.
  4. Remove the valve spring compressor and the adapter.
    5. Fig 4: Identifying Valve Spring & Retainer
    GM1210879Courtesy of GENERAL MOTORS CORP.
  5. Remove the valve spring retainer.
  6. Remove the valve spring.
    7. Fig 5: View Of Valve
    GM1210884Courtesy of GENERAL MOTORS CORP.
  7. Remove the valve.
    8. Fig 6: Removing/Installing Valve Stem Oil Seals With EN 46116
    GM1210887Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: NEVER reuse a valve stem oil seal.
  8. Remove the valve stem oil seal using the EN 46116  and discard.
  9. Repeat these procedures for the remaining valves.
    10. Fig 7: Cylinder Head Oil Gallery Expansion Plugs
    GM1210891Courtesy of GENERAL MOTORS CORP.
  10. Remove the cylinder head oil gallery expansion plugs.
    11. Fig 8: Locating Cylinder Head Coolant Threaded Plugs
    GM1210901Courtesy of GENERAL MOTORS CORP.
  11. Remove the cylinder head coolant threaded plugs.
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