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Home >> Cadillac >> 2021 >> CT4 V, RWD >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 2.7L (L3B) - Repair Instructions - Ct4 (6 Of 6) >> Compressor Air Intake Turbocharger Replacement >> Removal Procedure

Removal Procedure

WARNING:

In order to avoid being burned, do not service the exhaust system while it is still hot. Service the system when it is cool.

WARNING:

Avoid contact with HOT components. Wear safety glasses and protective gloves to avoid personal injury.

  1. Disconnect the battery. Battery Negative Cable Disconnection and Connection
  2. Remove the oil fill cap.
  3. GM5432171Courtesy of GENERAL MOTORS COMPANY

    Intake Manifold Cover Bolt (1) - Remove [2x]

  4. Lift up on the front of the intake manifold cover (2).
  5. GM5432174Courtesy of GENERAL MOTORS COMPANY

    Intake Manifold Cover (1) @ Upper Intake Manifold Bracket (2) - Remove

  6. GM5398955Courtesy of GENERAL MOTORS COMPANY

    Air Cleaner Outlet Duct Clamp (1) - Loosen [2x]

  7. Evaporative Emission Canister Purge Tube (2) - Disconnect - Plastic Collar Quick Connect Fitting Service
  8. Positive Crankcase Ventilation Tube (3) - Disconnect - Plastic Collar Quick Connect Fitting Service
  9. Electrical Connector @ Evaporative Emission Canister Purge Solenoid Valve - Disconnect
  10. GM5398967Courtesy of GENERAL MOTORS COMPANY

    Air Cleaner Outlet Duct (1) - Remove

  11. Disconnect the electrical connector and remove all wiring harnesses from the air cleaner assembly.
  12. GM5399053Courtesy of GENERAL MOTORS COMPANY

    Air Cleaner Bolt (1) - Remove

  13. GM5399073Courtesy of GENERAL MOTORS COMPANY

    Air Cleaner Assembly (1) - Remove

  14. GM5399121Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    The use of excessive force may damage the threads in the exhaust manifold/pipe.

    NOTE:

    The heated oxygen sensor MAY be difficult to remove when the engine temperature is less than 48°C (120°F).

    NOTE:

    The heated oxygen sensor in-line connector and louvered end MUST be kept clear of all grease, dirt, and other contaminants. Do NOT use cleaning solvents of any type. Do NOT drop or roughly handle the sensor.

    Disconnect and reposition electrical connectors as necessary.

  15. Using the EN-6179  Heated Oxygen Sensor Remover/Installer, remove the heated oxygen sensor (1).
  16. GM5395457Courtesy of GENERAL MOTORS COMPANY

    Turbocharger Heat Shield Bolt (1) - Remove [2x]

  17. GM5395458Courtesy of GENERAL MOTORS COMPANY

    Turbocharger Heat Shield Bolt (1) - Remove [2x]

  18. GM5395459Courtesy of GENERAL MOTORS COMPANY

    Turbocharger Heat Shield (1) - Remove

  19. GM5399142Courtesy of GENERAL MOTORS COMPANY

    Retainer Spring (1) - Release

  20. Charge Air Cooler Inlet Air Tube (2) @ Turbocharger (3) - Remove
  21. GM5494001Courtesy of GENERAL MOTORS COMPANY

    Retainer (1) - Unclip

  22. GM5407967Courtesy of GENERAL MOTORS COMPANY

    Water Pump Cover Bolt (1) - Remove [3x]

  23. Water Pump Cover (2) - Remove
  24. Install the engine support fixture. Engine Support Fixture
  25. GM5491648Courtesy of GENERAL MOTORS COMPANY

    Engine Mount Nut (1) - Remove

  26. Use the EN-51007  Global Engine Support Fixture to raise the engine off the engine mount.
  27. GM5491651Courtesy of GENERAL MOTORS COMPANY

    Engine Mount Bracket Bolt (1) - Remove and DISCARD [4x]

  28. GM5495033Courtesy of GENERAL MOTORS COMPANY

    Engine Mount Bracket (1) - Remove

  29. CAUTION:

    Phenolic spacer must be present to prevent galvanic/corrosive reaction and/or excessive temperature conduction between engine mount bracket and engine mount. Replace mount if phenolic spacer is missing or damaged. Failure to ensure phenolic spacer is intact and not damaged can lead to premature failure of engine mount and/or engine mount bracket.

  30. Ensure the phenolic spacer remains in place.
  31. GM5403738Courtesy of GENERAL MOTORS COMPANY

    Exhaust Pipe Clamp (1) - Loosen

  32. GM5395337Courtesy of GENERAL MOTORS COMPANY

    Compressor Air Intake Turbocharger Wastegate Actuator Link Spring (1) - Remove

  33. Compressor Air Intake Turbocharger Wastegate Actuator Link Clip (2) - Remove
  34. Compressor Air Intake Turbocharger Wastegate Actuator Rod (3) @ Turbocharger Wastegate Actuator - Disconnect
  35. GM5395335Courtesy of GENERAL MOTORS COMPANY

    Hose Clamp (1) - Disengage - Hose Clamp Replacement Guidelines - Spring Type

  36. Turbocharger Coolant Feed and Return Pipe (2) @ Exhaust Manifold Outlet Pipe - Remove
  37. GM5395343Courtesy of GENERAL MOTORS COMPANY

    Hose Clamp (1) - Disengage - Hose Clamp Replacement Guidelines - Spring Type

  38. Turbocharger Coolant Feed Hose (2) @ Turbocharger Coolant Feed and Return Pipe - Remove
  39. GM5395358Courtesy of GENERAL MOTORS COMPANY

    Turbocharger Coolant Feed and Return Pipe Bolt (1) - Remove [2x]

  40. GM5395366Courtesy of GENERAL MOTORS COMPANY

    Turbocharger Coolant Feed and Return Pipe (1) - Remove

  41. Turbocharger Coolant Feed and Return Pipe Gasket (2) - Remove and DISCARD
  42. GM5517316Courtesy of GENERAL MOTORS COMPANY

    Retainer (1) - Disconnect [3x]

  43. Electrical Connector (2) - Disconnect [2x]
  44. Reposition the front axle vent hose (3), and electrical harness (4).
  45. GM5156836Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    The Positive Crankcase Ventilation (PCV) line is tamper resistant and must always be replaced once it is removed. The fittings connected to the PCV line must also be replaced if they are damaged when the PCV line is removed. To reduce the risk of damage to the fittings, use a suitable cutting tool and carefully cut the connections away.

    NOTE:

    Disconnecting the tamper resistant connections will damage the positive crankcase ventilation tube, it must be replaced after removal.

    Use a suitable tool to disconnect the 6 locking tabs at each temper resistant connection.

  46. Positive Crankcase Ventilation Tube (1) - Remove and DISCARD
  47. GM5146481Courtesy of GENERAL MOTORS COMPANY

    Turbocharger Brace Nut (1) - Remove

  48. Turbocharger Bracket Bolt (2) - Remove [2x]
  49. Turbocharger Brace (3) - Remove
  50. Turbocharger Oil Feed Pipe Bolt (4) - Remove [4x]
  51. GM5146546Courtesy of GENERAL MOTORS COMPANY

    Turbocharger Nut (1) - Remove [2x]

  52. Turbocharger Bolt (2) - Remove [2x]
  53. GM5146550Courtesy of GENERAL MOTORS COMPANY

    Turbocharger Assembly (1) - Remove

  54. Turbocharger Gasket (2) - Remove and DISCARD
  55. GM5004022Courtesy of GENERAL MOTORS COMPANY

    Turbocharger Oil Feed Pipe Bolt (1) @ Compressor Air Intake Turbocharger - Remove [2x]

  56. Turbocharger Oil Feed Pipe (2) - Remove
  57. WARNING:

    When removing, handling or installing this component wear protective gloves. The sharp edges on the component may be very sharp and may cause injury.

  58. Turbocharger Oil Return Pipe Gasket (3) - Remove and DISCARD
  59. Turbocharger Oil Return Pipe Gasket (4) - Remove and DISCARD
  60. Turbocharger Oil Return Pipe Gasket (5) - Remove and DISCARD