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Home >> Cadillac >> 2021 >> CT4 Sport, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 199 (Engine Mechanical - 3.6L (LF4) - Repair Instructions (4 Of 4)) >> Repair Instructions >> Engine Replacement (with MHU) >> 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. Mount the engine onto a suitable engine stand. Engine Removal and Installation (with MHU) , or Engine Removal and Installation (with MG9) 
  2. GM5862841
    NOTE:

    Some components not shown for graphic clarity.

    Positive Crankcase Ventilation Tube Connector (1) - Disconnect [2x] - Plastic Collar Quick Connect Fitting Service

  3. Positive Crankcase Ventilation Foul Air Tube (2) - Remove
  4. GM5842421

    Evaporative Emission Canister Purge Tube (1) - Disconnect [2x] - Plastic Collar Quick Connect Fitting Service

  5. Evaporative Emission Canister Purge Tube (1) - Remove
  6. GM5839336

    Disconnect the electrical connectors.[2x]

  7. Turbocharger Wastegate Actuator Vacuum Tank Bolt (3) - Remove [2x]
  8. GM5839386

    Disconnect the electrical connectors.[2x]

  9. Turbocharger Wastegate Actuator Vacuum Tank Bolt (3) - Remove [2x]
  10. GM4052248

    Charge Air Bypass Valve Vacuum Tank Tube (3) - Disconnect - Plastic Collar Quick Connect Fitting Service

  11. GM4057362

    Turbocharger Wastegate Actuator Vacuum Source Tube (1) @ Vacuum Pump - Disconnect - Plastic Collar Quick Connect Fitting Service

  12. GM4057385

    Charge Air Bypass Valve Tube (1) @ Charge Air Bypass Valve - Disconnect - Plastic Collar Quick Connect Fitting Service

  13. GM4057453

    Electrical Connector (1) @ Charge Air Bypass Valve (2) - Disconnect

  14. GM4057618

    Charge Air Bypass Valve Tube (1) @ Charge Air Bypass Valve - Disconnect - Plastic Collar Quick Connect Fitting Service

  15. GM4057709

    Electrical Connector (1) @ Charge Air Bypass Valve (2) - Disconnect

  16. GM4057738

    Turbocharger Wastegate Actuator Vacuum Tank Bolt (1) - Remove [2x]

  17. Turbocharger Wastegate Actuator Vacuum Tank (2) - Remove
  18. GM5840540
    NOTE:

    Charge air bypass valve can stay connect to the charge air cooler inlet pipe (1).

    Charge Air Cooler Inlet Air Tube Bolt (1) - Remove [2x]

  19. Charge Air Bypass Valve Tube Connector Clamp (2) - Loosen
  20. Charge Air Cooler Inlet Pipe (3) - Remove
  21. Charge Air Cooler Inlet Air Tube Seal (4) - Remove and DISCARD
  22. GM5840576
    NOTE:

    Charge air bypass valve can stay connect to the charge air cooler inlet pipe (1).

    Charge Air Cooler Inlet Air Tube Bolt (1) - Remove [2x]

  23. Charge Air Bypass Valve Tube Connector Clamp (2) - Loosen
  24. Charge Air Cooler Inlet Pipe (3) - Remove
  25. Charge Air Cooler Inlet Air Tube Seal (4) - Remove and DISCARD
  26. GM5862662
    NOTE:
    • Some components not shown for graphic clarity.
    • Supercharger water manifold can stay attached to charger air cooler cover.

    Disconnect the electrical connector.

  27. Charge Air Cooler Bolt (1) - Remove [2x]
  28. Charge Air Cooler Cover Bolt (2) - Remove [12x]
  29. GM5862663
    NOTE:
    • Some components not shown for graphic clarity.
    • Supercharger water manifold can stay attached to charger air cooler cover.

    Charge Air Cooler Cover (1) - Remove

  30. Intake Manifold Gasket (2) - Remove and DISCARD
  31. Charge Air Cooler Cover Seal (3) - Remove and DISCARD [2x]
  32. GM5864681

    Disconnect all electrical connectors.

  33. Lower Intake Manifold Bolt (1) - Remove [6x]
  34. GM5864683

    Intake Manifold (1) - Remove

  35. Lower Intake Manifold Gasket (2) - Remove and DISCARD [6x]
  36. GM5861128
    NOTE:

    Replace only the components necessary to complete the repair.

    Disconnect the ignition coil electrical connector.

  37. Ignition Coil Bolt (1) - Remove [3x]
  38. Ignition Coil-Bank 1 (2) - Remove [3x]
  39. GM5861168
    NOTE:

    Replace only the components necessary to complete the repair.

    Disconnect the ignition coil electrical connector.

  40. Ignition Coil Bolt (1) - Remove
  41. Ignition Coil-Bank 2 (2) - Remove
  42. GM5870393
    WARNING:

    The noise cancelling foam component MUST be replaced if it has been exposed to engine fluids. Failure to replace the noise cancelling foam component that has been exposed to engine fluids may result in an engine fire resulting in catastrophic engine damage, and possible injury or death.

    Fuel Injection Fuel Rail Noise Shield (1) - Remove

  43. GM5869742
    CAUTION:

    Fuel feed intermediate pipes will be delivered with shipping caps that are meant to protect the mating joint threads. Do NOT remove shipping caps until the pipe is to be installed and joints are to be secured. Failure to do so could result in damage to the mating threads.

    NOTE:

    Do NOT reuse the fuel feed intermediate pipe. If the fuel feed intermediate pipe fittings are loosened or the pipes are removed, the pipes MUST be replaced.

    Fuel Feed Intermediate Pipe Nut (1) @ Fuel Feed Intermediate Pipe (2) - Loosen until disengaged [3x]

  44. Fuel Feed Intermediate Pipe (2) - Remove and DISCARD
  45. GM5876237
    NOTE:

    The fuel injection fuel rail bolts are retained in the fuel rail by keepers and may be difficult to remove.

    Fuel Injection Fuel Rail Bolt (1) - Remove [4x]

  46. Disconnect the fuel injection fuel rail electrical connectors and remove the 2 retainers from the fuel feed pipe bracket.
  47. GM5876881
    NOTE:

    The fuel injection fuel rail bank 2 bolts must be removed for clearance purposes.

    Fuel Injection Fuel Rail Bolt (1) - Remove [4x]

  48. GM5876756
    NOTE:
    • In some cases, the fuel injectors may be difficult to remove because of heavy carbon build-up or other factors. DO NOT use excessive force with the removal tool. If injectors are difficult to remove, apply solvent to the base of the injector bores, and allow adequate soaking time, to loosen the fuel injectors.
    • Pull the fuel rail and injectors as an assembly.
    • To prevent material from entering the combustions chambers make sure the area around each injector is clean and free of debris before the injectors are removed from the injector bores.

    Install 2 sets of the EN-49248  Injector Rail Assembly Remover (1).

  49. Use the EN-49248 - 4  Hooks (1) to slowly work the fuel injection fuel rail (2) upwards in small, even increments.
  50. Once the fuel injection fuel rail (2) is free, remove the EN-49248  Injector Rail Assembly Remover components (1).
  51. GM5876891
    CAUTION:
    • Remove the fuel rail assembly carefully in order to prevent damage to the injector electrical connector terminals and the injector spray tips. Support the fuel rail after the fuel rail is removed in order to avoid damaging the fuel rail components.
    • Cap the fittings and plug the holes when servicing the fuel system in order to prevent dirt and other contaminants from entering open pipes and passages.

    Simultaneously lift both ends of the fuel injection fuel rail (1) and remove the fuel rail assembly from the cylinder head.

  52. GM5877028

    Remove and DISCARD the 8 fuel injector nozzle housing seals (1) from the injectors that remain in the fuel rail.

  53. GM5876237
    NOTE:

    The fuel injection fuel rail bank 1 bolts must be removed for clearance purposes.

    Fuel Injection Fuel Rail Bolt (1) - Remove [4x]

  54. GM5877173
    NOTE:
    • In some cases, the fuel injectors may be difficult to remove because of heavy carbon build-up or other factors. DO NOT use excessive force with the removal tool. If injectors are difficult to remove, apply solvent to the base of the injector bores, and allow adequate soaking time, to loosen the fuel injectors.
    • Pull the fuel rail and injectors as an assembly.
    • To prevent material from entering the combustions chambers make sure the area around each injector is clean and free of debris before the injectors are removed from the injector bores.

    Install 2 sets of the EN-49248  Injector Rail Assembly Remover (1).

  55. Use the EN-49248 - 4  Hooks (1) to slowly work the fuel injection fuel rail (2) upwards in small, even increments.
  56. Once the fuel injection fuel rail (2) is free, remove the EN-49248  Injector Rail Assembly Remover components (1).
  57. GM5877180
    CAUTION:
    • Remove the fuel rail assembly carefully in order to prevent damage to the injector electrical connector terminals and the injector spray tips. Support the fuel rail after the fuel rail is removed in order to avoid damaging the fuel rail components.
    • Cap the fittings and plug the holes when servicing the fuel system in order to prevent dirt and other contaminants from entering open pipes and passages.

    Simultaneously lift both ends of the fuel injection fuel rail (1) and remove the fuel rail assembly from the cylinder head.

  58. GM5877028

    Remove and DISCARD the 8 fuel injector nozzle housing seals (1) from the injectors that remain in the fuel rail.

  59. GM5877415

    DIsconnect the knock sensor electrical connector.

  60. Knock Sensor Bolt (1) - Remove
  61. Knock SensorBank 1 (2) - Remove
  62. GM5877428

    DIsconnect the knock sensor electrical connector.

  63. Knock Sensor Bolt (1) - Remove
  64. Knock SensorBank 2 (2) - Remove
  65. GM5871517
    CAUTION:

    Alternately loosen the fuel pump bolts one turn at a time until the pump is fully disengaged from fuel pump lifter follower. Trying to remove the pump bolts without even side-to-side loosening may result in pump plunger damage

    Fuel Pump Bolt (1) - Remove [2x]

    66. NOTE:

    Ensure that during removal of the fuel pump that the valve lifter follower does NOT fall apart.

  66. Fuel Pump (2) - Remove
    67. NOTE:
    • The valve lifter follower MAY remain in the cylinder head bore after removing the fuel pump.
    • If the valve lifter follower does NOT pull out of the cylinder head bore with the fuel pump, then remove it afterwards.
  67. Valve Lifter Follower (3) - Remove
  68. Fuel Pump Bracket Gasket (4) - Remove and DISCARD
  69. Fuel Pump Housing Seal (5) - Remove and DISCARD
  70. GM5873812

    Turbocharger Coolant Feed and Return Pipe Bolt (1) - Remove

  71. Turbocharger Coolant Feed and Return Pipe Gasket (2) - Remove and DISCARD [2x]
  72. Turbocharger Coolant Return Pipe (3) - Remove
  73. GM5873866

    Turbocharger Heat Shield Bolt (1) - Remove [3x]

  74. GM5876059

    Turbocharger Heat Shield (1) - Remove

  75. GM5875574
    NOTE:

    Some components not shown for graphic clarity.

    Using a suitable tool, remove the turbocharger oil feed pipe fitting clip (1).

  76. Turbocharger Oil Feed Pipe Bolt (2) - Remove
  77. Turbocharger Oil Feed Pipe Washer (3) - Remove and DISCARD [2x]
  78. Turbocharger Oil Feed Pipe (4) - Remove
  79. GM5892103

    Turbocharger Coolant Feed and Return Pipe Bolt (1) - Remove

  80. Turbocharger Coolant Feed and Return Pipe Gasket (2) - Remove and DISCARD [2x]
  81. Turbocharger Coolant Feed Pipe (3) @ Compressor Air Intake Turbocharger - Separate
  82. GM5875517
    NOTE:

    Some components not shown for graphic clarity.

    Turbocharger Oil Return Pipe Bolt (1) - Remove [4x]

  83. GM5875520
    NOTE:

    Some components not shown for graphic clarity.

    Turbocharger Oil Return Pipe (1) - Remove

  84. Turbocharger Oil Return Pipe Gasket (2) - Remove and DISCARD [2x]
  85. GM5880448

    Turbocharger Bolt (1) - Remove [4x]

  86. GM5880449

    Compressor Air Intake Turbocharger (1) - Remove

  87. Turbocharger Gasket (2) - Remove and DISCARD
  88. GM4017620

    Install the EN-46106  Flywheel Holding Tool (1).

  89. GM5906799

    Automatic Transmission Flex Plate Bolt (1) - Remove and DISCARD [8x]

  90. Automatic Transmission Flex Plate (2) - Remove
  91. GM4017620

    Remove the EN-46106  Flywheel Holding Tool (1).

  92. GM5869547

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

  93. GM5869549
    NOTE:

    Some components not shown for graphic clarity.

    Engine Mount Bracket- Left Side (1) - Remove

  94. GM5869860

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

  95. GM5869862
    NOTE:

    Some components not shown for graphic clarity.

    Engine Mount Bracket- Right Side (1) - Remove

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