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Home >> Cadillac >> 2004 >> CTS Base, 3.2 N >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 15 (Engine Mechanical - 3.6L (Ly7) (Repair Procedures -- 3 Of 5)) >> Off-Vehicle Repair Instructions - Part 2 >> Cylinder Head Disassemble

Cylinder Head Disassemble

WARNING: This page is about a different variant/trim than selected.

Tools Required

    Fig 1: Loosening Valve Keepers With Sized Deep Socket & Plastic Hammer
    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: Compressing Valve Springs
    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: Identifying Valve Spring Compressor & Adapter
    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: Removing & Installing Valve Spring
    GM1210879Courtesy of GENERAL MOTORS CORP.
  5. Remove the valve spring retainer.
  6. Remove the valve spring.
    7. Fig 5: Removing & Installing Valves
    GM1210884Courtesy of GENERAL MOTORS CORP.
  7. Remove the valve.
    8. Fig 6: Removing & Installing Valve Stem Oil Seal
    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: Removing & Installing Cylinder Head Oil Gallery Expansion Plugs
    GM1210891Courtesy of GENERAL MOTORS CORP.
  10. Remove the cylinder head oil gallery expansion plugs.
    11. Fig 8: Removing & Installing Cylinder Head Coolant Threaded Plugs
    GM1210901Courtesy of GENERAL MOTORS CORP.
  11. Remove the cylinder head coolant threaded plugs.
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