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Home >> Cadillac >> 2021 >> CT4 Sport, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 170 (Engine Mechanical - 2.7L (L3B) - Repair Instructions (2 Of 3)) >> Repair Instructions >> Camshaft Carrier Replacement >> Cleaning and Inspection Procedure - Required

Cleaning and Inspection Procedure - Required

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  1. GM5896858
    WARNING:

    Refer to Camshaft Position Actuator Removal and Installation Warning .

    WARNING:

    Refer to Safety Glasses Warning .

    Clean the camshaft position actuator (1) with cleaning solvent.

  2. Remove any dirt, debris, or restrictions within the oil passages (6).
    3. WARNING:

    Refer to Safety Glasses and Compressed Air Warning

  3. Dry the camshaft position actuator with compressed air.
  4. Insert a tie strap through the center of the camshaft position actuator and around the gear teeth to keep the components aligned.
  5. Inspect the camshaft position actuator for the following conditions:
    1. A broken spring (2)
    2. Damage to the timing sprocket teeth (3)
    3. Damage to the reluctor wheel (4)
    4. Damage to the center bore (5)
    5. Damage to the oil passages (6)
  6. If any of the above conditions exist, replace the camshaft position actuator.
  7. GM3270307
    NOTE:
    • The inspection procedure is provided for diagnostic purposes only.
    • Do not use the camshaft position actuator solenoid valve bolt again. Install a NEW valve during assembly.

    Inspect the camshaft position actuator solenoid valve bolt for the following conditions:

    1. Dirt, debris, restrictions or damage within the oil passages (1)
    2. Damaged threads (2)

      If the threads of the valve are damaged, also inspect the threads in the front of the camshaft for damage.

    3. Dirt, debris, restrictions or damage within the oil inlet (3)

      If debris is detected, the engine assembly should be inspected to determine the source of contamination.

  8. GM5896300
    NOTE:

    Do not soak or submerge the fuel pump in solvent.

    Clean the fuel pump (2) and valve lifter follower (5).

    9. WARNING:

    Refer to Safety Glasses and Compressed Air Warning

  9. Dry the fuel pump and valve lifter follower with compressed air.
  10. Inspect the fuel pump for the following conditions:
    1. Damage to the connection ports (1)
    2. Damage to the electrical connector (2)
    3. Damage to the sealing surface (3)
    4. Damage to or a bent or binding plunger (7)
    5. Damage to the mounting holes (8)
  11. Inspect the valve lifter follower for the following conditions:
    1. A scored or worn fuel pump contact surface (4)
    2. A severely scuffed or worn body (5)
    3. Binding or roughness of the roller (6)
  12. If any of the above conditions exist, replace the fuel pump and/or the valve lifter follower.
  13. GM5896416
    NOTE:

    The guide pins in the retracted state will protrude approximately 5.05 mm (0.199 in) to 5.36 mm (0.211 in).

    NOTE:

    Do not soak or submerge the camshaft profile actuator in solvent.

    Clean the camshaft profile actuator (1) electrical connector and actuator pin of dirt, debris or contamination.

    14. WARNING:

    Refer to Safety Glasses and Compressed Air Warning

  14. Dry the camshaft profile actuator with compressed air.
  15. Inspect the camshaft profile actuator for the following conditions:
    1. Damage to the electrical connector (2)
    2. Damage to the sealing surface (3)
    3. Damage to the actuator pin (4)
    4. Damage to the mounting holes (5)
  16. If any of the above conditions exist, replace the camshaft profile actuator.
  17. GM5896299
    NOTE:

    Do not soak or submerge the camshaft position actuator magnet in solvent.

    Clean the camshaft position actuator magnet electrical connector and mounting surface of dirt, debris or contamination.

    18. WARNING:

    Refer to Safety Glasses and Compressed Air Warning

  18. Dry the camshaft position actuator magnet with compressed air.
  19. Inspect the camshaft position actuator magnet for the following conditions:
    1. Damage to the sealing surface (1)
    2. Damage to the electrical connector (2)
    3. Damage to the mounting holes (3)
  20. Depress the valve (4) into the housing. The valve should move freely with no binding or sticking and minimal resistance inward.
  21. If any of the above conditions exist, replace the camshaft position actuator magnet.
  22. GM5087290

    Clean the camshaft in solvent.

    23. WARNING:

    Refer to Safety Glasses and Compressed Air Warning

  23. Dry the camshaft with compressed air.
  24. Inspect the camshaft oil feed holes (5) for dirt, debris or blockage.
  25. Inspect the threaded hole (6) for damage.
  26. Inspect the camshaft lobes (1, 3) and journals (2, 4) for the following conditions:
    1. Excessive scoring or pitting
    2. Discoloration from overheating
    3. Deformation from excessive wear, especially the camshaft lobes
  27. If any of the above conditions exist, replace the camshaft.
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