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Home >> GMC >> 2018 >> Terrain Denali, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Mechanical - 1.5L (LYX)) >> Repair Instructions - On Vehicle >> Valve Stem Oil Seal And Valve Spring Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
  1. Remove Spark Plug Replacement
  2. Remove Hydraulic Valve Lash Adjuster Arm Replacement 
  3. Fig 1: Valve Stem Oil Seal and Valve Spring Tools
    GM3701707Courtesy of GENERAL MOTORS COMPANY
  4. Install the 2 EN-50717-1  stands (1, 4) to the cylinder head and fix them with the screws (5, 6).
  5. Install the 2 EN-50717-3  rods (2) to the EN-50717-1  stands (1, 4).
  6. Install the EN-50717-2  compressor (3) to the EN-50717-3  rods (2).
  7. Plug the injector bores, using the EN-51511  plug.
  8. Install a suitable air pressure adapter to the spark plug hole.
  9. NOTE:

    To keep the valve seated in the valve seat, ensure that air pressure is always applied to the combustion chamber of the treated cylinder.

  10. Apply air pressure to the corresponding cylinder.
  11. Position the EN-50717-2  compressor (3) so that its adapter properly contacts the valve spring retainer then pretension the compressor.
  12. Fig 2: Valve Spring Retainer And Valve Spring
    GM2678153Courtesy of GENERAL MOTORS COMPANY
    WARNING:

    Valve springs can be tightly compressed. Use care when removing the retainers and plugs. Personal injury could result.

    NOTE:

    Mark all components to ensure they are returned to their original location upon installation.

  13. Apply pressure to the EN-50717-2  compressor to push down the vale spring retainer (1) and compress the valve spring (3) until the valve keys (2) are free from tension.
  14. Carefully remove the valve keys (2).
  15. Release the tension from the EN-50717-2  compressor.
  16. Fig 3: Valve Springs And Retainers
    GM3216197Courtesy of GENERAL MOTORS COMPANY
  17. Remove the valve spring retainer (2) and the exhaust valve spring (1) or intake valve spring (3).
  18. Fig 4: Pliers And Intake Valve Stem Oil Seals
    GM2373171Courtesy of GENERAL MOTORS COMPANY
  19. Using EN-46116  remover (1), remove and DISCARD the valve stem oil seal (2).