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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 158 (Engine Mechanical - 2.7L (L3B) - Repair Instructions (1 Of 3)) >> Repair Instructions >> Camshaft Timing Chain Replacement >> Cleaning and Inspection Procedure - Required

Cleaning and Inspection Procedure - Required

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  1. GM5896858
    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. 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. GM5044133

    Clean the crankshaft balancer with soap and water.

  9. Dry the crankshaft balancer with compressed air.
  10. NOTE:

    A crankshaft balancer hub seal surface (2) with excessive scoring, grooves, rust or other damage must be replaced.

  11. Inspect the crankshaft balancer for the following:
    1. Worn or damaged hub-to-crankshaft surface (1)
    2. Worn, grooved or damaged hub seal surface (2)
    3. Worn, chunking or deteriorated rubber between the hub and pulley (3)
    4. Damaged drive belt ribs (4)
    5. Damaged webs (5)
  12. If any of the above conditions exist, replace the crankshaft balancer.
  13. GM5896859

    Clean the crankshaft sprocket (1) in solvent.

  14. Dry the crankshaft sprocket with compressed air.
  15. Inspect the crankshaft sprocket for grooves, excessive wear, or chipping.
  16. Inspect the crankshaft sprocket for damage to the teeth (2)
  17. If any of the above conditions exist, replace the crankshaft sprocket.
  18. GM5863014

    Clean the timing chain (1) in solvent.

  19. Dry the timing chain with compressed air.
  20. Inspect the timing chain for signs of excessive wear, chipping, or seizure of the timing chain links.
  21. Replace the timing chain if damaged.
  22. GM5897283

    Clean out debris from the bolt holes.

  23. Clean the timing chain guide (1) in solvent.
  24. Dry the timing chain guide with compressed air.
    1. Damage, cracking or wear to the timing chain guide (1)
    2. Damage or wear to the bolt holes (2)
    3. Wear exceeding 1.12 mm (0.045 in) of depth on the chain guide surface (3)
  25. If any of the above conditions exist, replace the timing chain guide.
  26. GM5897284

    Clean out debris from the bolt holes.

  27. Clean the timing chain guide (1) in solvent.
  28. Dry the timing chain guide with compressed air.
    1. Damage, cracking or wear to the timing chain guide (1)
    2. Damage or wear to the bolt holes (2)
    3. Wear exceeding 1.12 mm (0.045 in) of depth on the chain guide surface (3)
  29. If any of the above conditions exist, replace the timing chain guide.
  30. GM5896863

    Clean the timing chain tensioner (1) in solvent.

  31. Clean out debris from the bolt holes and around the plunger.
  32. Dry the timing chain tensioner with compressed air.
  33. Inspect the timing chain tensioner for the following conditions:
    1. Damage or wear to the body (1)
    2. Damage or wear to the bolt holes (2)
    3. Damage or wear to the plunger (3)
  34. If any of the above conditions exist, replace the timing chain tensioner.