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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 134 (Engine Heating And Cooling - Repair Instructions (2 Of 2)) >> Repair Instructions >> Engine Coolant Thermostat Housing Inlet Pipe Replacement (L3B) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
  1. Drain the cooling system. Cooling System Draining and Filling (L3B Static Fill) , or Cooling System Draining and Filling (L3B GE 47716)
  2. Remove the oil fill cap.
  3. GM5432171

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

  4. Lift up on the front of the intake manifold cover (2).
  5. GM5432174

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

  6. GM5399488

    Electrical Connector (1) @ Engine Coolant Temperature Sensor - Disconnect

  7. Hose Clamp (2) - Disengage - Hose Clamp Replacement Guidelines - Spring Type
  8. Radiator Surge Tank Inlet Hose (3) @ Exhaust Manifold Outlet Pipe - Remove
  9. GM5399490

    Hose Clamp (1) - Disengage [2x] - Hose Clamp Replacement Guidelines - Spring Type

  10. Turbocharger Coolant Feed and Return Pipe (2) @ Exhaust Manifold Outlet Pipe - Remove
  11. Heater Inlet Hose (3) @ Exhaust Manifold Outlet Pipe - Remove
  12. GM5399494

    Engine Wiring Harness Connector (1) @ Exhaust Manifold Outlet Pipe - Remove

  13. Exhaust Manifold Outlet Pipe Bolt (2) - Remove
  14. GM5399498

    Engine Wiring Harness Retainer (1) @ Exhaust Manifold Outlet Pipe - Remove

  15. GM5399499

    Exhaust Manifold Outlet Pipe Bolt (1) - Remove

  16. Hose Clamp (2) - Disengage - Hose Clamp Replacement Guidelines - Spring Type
  17. Exhaust Manifold Outlet Pipe (3) @ Engine Coolant Flow Control Valve - Remove
  18. GM5399501

    Exhaust Manifold Outlet Pipe Bolt (1) - Remove [2x]

  19. Exhaust Manifold Outlet Pipe (2) - Remove
  20. Exhaust Manifold Outlet Pipe Gasket (3) - Remove and DISCARD
  21. GM5398955

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

  22. Evaporative Emission Canister Purge Tube (2) - Disconnect - Plastic Collar Quick Connect Fitting Service
  23. Positive Crankcase Ventilation Tube (3) - Disconnect - Plastic Collar Quick Connect Fitting Service
  24. Electrical Connector @ Evaporative Emission Canister Purge Solenoid Valve - Disconnect
  25. GM5398967

    Air Cleaner Outlet Duct (1) - Remove

  26. Disconnect the electrical connector and remove all wiring harnesses from the air cleaner assembly.
  27. GM5399053

    Air Cleaner Bolt (1) - Remove

  28. GM5399073

    Air Cleaner Assembly (1) - Remove

  29. GM5399121
    CAUTION:

    Refer to Heated Oxygen and Oxygen Sensor Caution .

    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.

  30. Using the EN-6179  Heated Oxygen Sensor Remover/Installer, remove the heated oxygen sensor (1).
  31. GM5395457

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

  32. GM5395458

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

  33. GM5395459

    Turbocharger Heat Shield (1) - Remove

  34. GM5399142

    Retainer Spring (1) - Release

  35. Charge Air Cooler Inlet Air Tube (2) @ Turbocharger (3) - Remove
  36. GM5494001

    Retainer (1) - Unclip

  37. GM5407967

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

  38. Water Pump Cover (2) - Remove
  39. Install the engine support fixture. Engine Support Fixture
  40. GM5491648

    Engine Mount Nut (1) - Remove

  41. Use the EN-51007  Global Engine Support Fixture to raise the engine off the engine mount.
  42. GM5491651

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

  43. GM5495033

    Engine Mount Bracket (1) - Remove

    44. 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.

  44. Ensure the phenolic spacer remains in place.
  45. GM5403738

    Exhaust Pipe Clamp (1) - Loosen

  46. GM5395337

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

  47. Compressor Air Intake Turbocharger Wastegate Actuator Link Clip (2) - Remove
  48. Compressor Air Intake Turbocharger Wastegate Actuator Rod (3) @ Turbocharger Wastegate Actuator - Disconnect
  49. Turbocharger Coolant Feed and Return Pipe (2) @ Exhaust Manifold Outlet Pipe - Remove
  50. GM5395343

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

  51. Turbocharger Coolant Feed Hose (2) @ Turbocharger Coolant Feed and Return Pipe - Remove
  52. GM5395358

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

  53. GM5395366

    Turbocharger Coolant Feed and Return Pipe (1) - Remove

  54. Turbocharger Coolant Feed and Return Pipe Gasket (2) - Remove and DISCARD
  55. GM5517316

    Retainer (1) - Disconnect [3x]

  56. Electrical Connector (2) - Disconnect [2x]
  57. Reposition the front axle vent hose (3), and electrical harness (4).
  58. GM5156836
    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.

  59. Positive Crankcase Ventilation Tube (1) - Remove and DISCARD
  60. GM5146481

    Turbocharger Brace Nut (1) - Remove

  61. Turbocharger Bracket Bolt (2) - Remove [2x]
  62. Turbocharger Brace (3) - Remove
  63. Turbocharger Oil Feed Pipe Bolt (4) - Remove [4x]
  64. GM5146546

    Turbocharger Nut (1) - Remove [2x]

  65. Turbocharger Bolt (2) - Remove [2x]
  66. GM5146550

    Turbocharger Assembly (1) - Remove

  67. Turbocharger Gasket (2) - Remove and DISCARD
  68. GM5004022

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

  69. Turbocharger Oil Feed Pipe (2) - Remove
    70. 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.

  70. Turbocharger Oil Return Pipe Gasket (3) - Remove and DISCARD
  71. Turbocharger Oil Return Pipe Gasket (4) - Remove and DISCARD
  72. Turbocharger Oil Return Pipe Gasket (5) - Remove and DISCARD
  73. GM5672187

    Catalytic Converter Gasket (1) - Remove and DISCARD

  74. Exhaust Pipe Clamp (2) - Remove and DISCARD
  75. GM5400117

    Engine Wiring Harness Connector (1) @ Engine Coolant Thermostat Housing Inlet Pipe - Remove

  76. Engine Coolant Thermostat Housing Bracket Bolt (2) - Remove [2x]
  77. GM5400353

    Engine Coolant Thermostat Housing Bracket Bolt (1) - Remove

  78. Hose Clamp (2) - Disengage - Hose Clamp Replacement Guidelines - Spring Type
  79. Engine Coolant Thermostat Housing Inlet Pipe (3) @ Engine Coolant Flow Control Valve - Remove
  80. GM5400363

    Engine Coolant Thermostat Housing Inlet Pipe (1) - Remove

  81. Water Pump Outlet Port Seal (2) - Remove and DISCARD
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