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Home >> Chevrolet >> 2022 >> Tahoe SSV >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 18 (Engine Mechanical - 3.0L (Lm2) Diesel - Repair Instructions (3 Of 11)) >> Repair Instructions >> Cylinder Head Overhaul >> Disassemble Procedure

Disassemble Procedure

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  1. GM5227671Courtesy of GENERAL MOTORS COMPANY

    Fuel Injection Fuel Rail Stud (1) - Remove [3x]

  2. GM5149287Courtesy of GENERAL MOTORS COMPANY

    Camshaft Housing Cover Locating Pin (1) - Remove

  3. Cylinder Head Temperature Sensor (2) - Remove
  4. Engine Lift Bracket Retainer (3) - Remove
  5. Fig 1: Identifying Camshaft Position Sensor Components, Camshaft Housing Cover Pin, Cylinder Head Core Hole Plug And Engine Lift Bracket Retainer
    GM5149294Courtesy of GENERAL MOTORS COMPANY

    Camshaft Housing Cover Locating Pin (1) - Remove

  6. Cylinder Head Core Hole Plug (2) - Remove [2x]
  7. Camshaft Position Sensor Bolt (5) - Remove
  8. Camshaft Position Sensor (4) - Remove
  9. Camshaft Position Sensor Seal (3) - Remove and DISCARD
  10. Engine Lift Bracket Retainer (6) - Remove
  11. GM5236359Courtesy of GENERAL MOTORS COMPANY

    Assemble the EN-50717  Valve Spring Compressor components (1) with the EN-50717 - 20  Valve Spring Compressor Adapter Set (2).

  12. Install the assembled EN-50717  Valve Spring Compressor components on the cylinder head.
  13. GM5236362Courtesy of GENERAL MOTORS COMPANY
    WARNING:

    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:
    • Many internal engine components will develop specific wear patterns on their friction surfaces.
    • Components MUST be separated, marked, or organized in a way to ensure the installation to their original location and position. Take precautions in order to prevent interchanging of parts.
    • Tag or mark each part immediately when removed. Indicate the location, direction, or orientation when necessary.

    Align the EN-50717  Valve Spring Compressor (1) with the first valve spring retainer (2) to be removed.

  14. Using EN-50717  Valve Spring Compressor (1), compress the valve spring.
  15. Valve Stem Key (4) - Remove [2x]
  16. Slowly release the EN-50717  Valve Spring Compressor from the valve spring assembly.
  17. Valve Spring Retainer (2) - Remove
  18. Valve Spring (3) - Remove
  19. GM5236363Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    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.

    Using EN-840  Pliers / Remover, remove the valve stem oil seal (1). Discard all used seals and replace with new.

  20. Intake Valve (2) - Remove
  21. Repeat the procedure for the remaining intake valves and exhaust valves.
  22. Remove the EN-50717  Valve Spring Compressor components.
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