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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 136 (Engine Mechanical - 3.6L (LF4) - Repair Instructions (2 Of 4)) >> Repair Instructions >> Exhaust Camshaft Replacement - Right Side >> 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 charge air cooling system. Refer to Cooling System Draining and Filling (LF4 Static Fill) , or Cooling System Draining and Filling (LF4 GE 47716)
  2. GM5865881

    Plenum Front Panel (1) - Remove - Plenum Front Panel Removal and Installation (with Blackwing) , or Plenum Front Panel Removal and Installation (without Blackwing)

  3. GM5864524

    Radiator Air Upper Baffle Retainer (1) - Remove [5x]

  4. Radiator Air Upper Baffle Bolt (2) - Remove [2x]
  5. Radiator Air Upper Baffle (3) - Remove
  6. GM5839407
    NOTE:

    Left side shown, right side similar.

    Front End Sheet Metal Cross Brace Bolt- Right Side (1) - Remove [3x]

  7. Front Suspension Strut Upper Mounting Nut- Right Side (2) - Remove [2x]
  8. Release the engine wire harness retainers from the front end sheet metal cross brace.
  9. Front End Sheet Metal Cross Brace- Right Side (3) - Remove
  10. GM5872932
    NOTE:

    Left side shown, right side similar.

    Front End Sheet Metal Diagonal Brace Nut- Right Side (1) - Remove

  11. Front End Sheet Metal Cross Brace Bolt- Right Side (2) - Remove
  12. Front End Sheet Metal Diagonal Brace- Right Side (3) - Remove
  13. Oil Filler Cap - Remove
  14. GM5839283

    Intake Manifold Cover Bolt (1) - Remove

  15. Intake Manifold Cover (2) - Remove
  16. Install the oil filler cap after removal of the intake manifold cover to prevent debris from falling into the engine.
  17. GM5861123

    Radiator Surge Tank Inlet Hose Clamp (1) @ Radiator Surge Tank Inlet Hose - Disengage - Hose Clamp Replacement Guidelines - Spring Type

  18. Radiator Surge Tank Inlet Hose Clip (2) @ Engine Control Module Bracket - Remove
  19. Radiator Surge Tank Inlet Hose Clamp (4) @ Engine Radiator - Disengage - Hose Clamp Replacement Guidelines - Spring Type
  20. Radiator Surge Tank Outlet Pipe (3) - Remove
  21. GM5839234
    CAUTION:

    Always turn the ignition off when installing or removing the ECM connectors in order to prevent damage to the components.

    CAUTION:
    • Turn the ignition OFF when installing or removing the control module connectors and disconnecting or reconnecting the power to the control module in order to prevent internal control module damage.
    • Control module damage may result when the metal case contacts battery voltage. DO NOT contact the control module metal case with battery voltage when servicing a control module, using battery booster cables, or when charging the vehicle battery.
    • In order to prevent any possible electrostatic discharge damage to the control module, do no touch the connector pins or the soldered components on the circuit board.
    • Remove any debris from around the control module connector surfaces before servicing the control module. Inspect the control module connector gaskets, and ensure that the gaskets are installed correctly. The gaskets prevent contaminant intrusion into the control module.

    Disconnect the electrical connectors.

  22. Use a suitable tool to release the locking tabs securing the engine control module to the engine control module bracket.
  23. Engine Control Module (1) - Remove
  24. GM5839232

    Engine Control Module Bracket Bolt (1) - Remove [3x]

  25. GM5839233

    Use a suitable tool to release the locking tab and remove the transmission control module (1) by sliding it out from the engine control module bracket (2).

  26. Engine Control Module Bracket (2) - Remove
  27. GM5864667

    Air Cleaner Outlet Duct Clamp (1) - Loosen

  28. Air Cleaner Outlet Duct (2) - Reposition
  29. Air Cleaner Outlet Duct Clamp (3) - Loosen
  30. Auxiliary Air Cleaner Outlet Duct (4) - Reposition
  31. GM5862960

    Disconnect the electrical connectors.

  32. Remove all retainers from the air cleaner assembly and reposition wiring harnesses as necessary.
  33. Air Cleaner Bolt (1) - Remove
  34. Air Cleaner Assembly (2) - Remove
  35. GM5860354

    Charge Air Bypass Valve Hose Clamp (1) - Loosen

  36. Charge Air Bypass Valve Hose (2) - Reposition
  37. Retainer Spring (4) - Disengage
  38. GM5860355

    Air Cleaner Outlet Duct (1) - Remove

  39. 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]

  40. Charge Air Bypass Valve Tube Connector Clamp (2) - Loosen
  41. Charge Air Cooler Inlet Pipe (3) - Remove
  42. Charge Air Cooler Inlet Air Tube Seal (4) - Remove and DISCARD
  43. 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]

  44. Charge Air Bypass Valve Tube Connector Clamp (2) - Loosen
  45. Charge Air Cooler Inlet Pipe (3) - Remove
  46. Charge Air Cooler Inlet Air Tube Seal (4) - Remove and DISCARD
  47. GM5862841
    NOTE:

    Some components not shown for graphic clarity.

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

  48. Positive Crankcase Ventilation Foul Air Tube (2) - Remove
  49. GM5854948
    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.

    Using a suitable cutting tool, carefully cut the 2 positive crankcase ventilation tube connectors (1).

  50. Positive Crankcase Ventilation Foul Air Tube (2) - Remove and DISCARD
  51. GM5854975

    Charge Air Cooler Coolant Hose Retainer (1) @ Charge Air Cooler Coolant Outlet Pipe Bracket - Remove [2x]

  52. Charge Air Cooler Coolant Hose Clamp (3) - Disengage - Hose Clamp Replacement Guidelines - Spring Type
  53. Charge Air Cooler Coolant Hose (2) @ Supercharger Water Manifold - Reposition
  54. GM5860462

    Charge Air Cooler Coolant Hose Retainer (3) @ Charge Air Cooler Coolant Outlet Pipe Bracket - Remove

  55. Charge Air Cooler Coolant Hose Clamp (2) - Disengage - Hose Clamp Replacement Guidelines - Spring Type
  56. Charge Air Cooler Coolant Hose (1) @ Supercharger Water Manifold - Reposition
  57. GM5860656

    Radiator Inlet Hose Clip (Shown Open) (1) - Unclip

  58. Charge Air Cooler Coolant Hose Retainer (3) - Release
  59. Charge Air Cooler Coolant Hose (2) @ Engine Radiator - Remove
  60. GM5842421

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

  61. Evaporative Emission Canister Purge Tube (1) - Remove
  62. GM5861118

    Radiator Surge Tank Inlet Hose Clip (3) @ Radiator Surge Tank Inlet Pipe Bracket - Unclip

  63. Radiator Surge Tank Inlet Hose (4) - Reposition
  64. GM5839336

    Disconnect the electrical connectors.

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

    Disconnect the electrical connectors.

  67. Turbocharger Wastegate Actuator Vacuum Tank Bolt (3) - Remove [2x]
  68. GM5839308

    Turbocharger Wastegate Actuator Vacuum Tank Solenoid Valve Tube (3) @ Auxiliary Air Cleaner Outlet Duct - Disconnect - Plastic Collar Quick Connect Fitting Service

  69. GM4052248

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

  70. GM4057362

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

  71. GM4057385

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

  72. GM4057453

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

  73. GM4057618

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

  74. GM4057709

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

  75. GM4057738

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

  76. Turbocharger Wastegate Actuator Vacuum Tank (2) - Remove
  77. GM5871728

    Charge Air Cooler Coolant Hose Clamp (1) - Disengage - Hose Clamp Replacement Guidelines - Spring Type

  78. Charge Air Cooler Coolant Hose (2) - Remove
  79. Charge Air Cooler Coolant Hose Clamp (3) - Disengage - Hose Clamp Replacement Guidelines - Spring Type
  80. Charge Air Cooler Coolant Hose (4) - Remove
  81. GM5862662
    NOTE:
    • Some components not shown for graphic clarity.
    • Supercharger water manifold can stay attached to charger air cooler cover.

    Disconnect the electrical connector.

  82. Charge Air Cooler Bolt (1) - Remove [2x]
  83. Charge Air Cooler Cover Bolt (2) - Remove [12x]
  84. 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

  85. Intake Manifold Gasket (2) - Remove and DISCARD
  86. Charge Air Cooler Cover Seal (3) - Remove and DISCARD [2x]
  87. GM4044046

    Engine Rear Noise Shield Bolt (1) - Remove

  88. GM5869276

    Engine Rear Noise Shield Bolt (1) - Remove [2x]

  89. Wiring Harness Retainer (2) - Unclip [3x]
  90. Wiring Harness (3) - Reposition
  91. GM4044075

    Fuel Pipe Shield (1) - Remove

  92. GM5864681

    Disconnect all electrical connectors.

  93. Lower Intake Manifold Bolt (1) - Remove [6x]
  94. GM5864683

    Intake Manifold (1) - Remove

  95. Lower Intake Manifold Gasket (2) - Remove and DISCARD [6x]
  96. GM5861128

    Disconnect the electrical connectors.

  97. Ignition Coil Bolt (1) - Remove
  98. Ignition Coil (2) - Remove
  99. GM5872767
    NOTE:

    Some components not shown for graphic clarity.

    Engine Wiring Harness Retainer (1) - Remove [5x]

  100. Engine Wiring Harness (2) - Reposition
  101. GM5872769
    NOTE:

    Some components not shown for graphic clarity.

    Camshaft Housing Cover Bolt (1) - Remove [13x]

  102. GM5872771
    NOTE:

    Some components not shown for graphic clarity.

    Camshaft Cover (1) - Remove

  103. Camshaft Cover Seal (2) - Remove and DISCARD
  104. GM5873081

    Install 3 EN-46101  Spark Plug Tube Seal Guides (1).

  105. GM5839183

    Disconnect the electrical connector.

  106. Camshaft Position Sensor Bolt (1) - Remove
  107. Camshaft Position Sensor (2) - Remove
  108. GM5869340

    Disconnect the electrical connector.

  109. Camshaft Position Sensor Bolt (1) - Remove
  110. Camshaft Position Sensor (2) - Remove
  111. GM5868277

    Disconnect the electrical connector.

  112. Camshaft Position Actuator Solenoid Valve Bolt (1) - Remove
  113. Camshaft Position Actuator Solenoid Valve (2) - Remove
  114. GM5868314

    Disconnect the electrical connector.

  115. Camshaft Position Actuator Solenoid Valve Bolt (1) - Remove
  116. Camshaft Position Actuator Solenoid Valve (2) - Remove
  117. GM5893370
    NOTE:

    This will put the camshafts in a rested position and aid in removal.

    Rotate the engine clockwise using the crankshaft dampener retaining bolt until laser etched flats on both camshafts are facing up (1).

  118. GM5896085
    CAUTION:

    Refer to Torque Reaction Against Timing Drive Chain Caution .

    NOTE:

    Do NOT remove or back out the camshaft position actuator bolt. Simply break them loose from their fully-torqued position. The position actuators must stay firmly attached until the retaining tools are in place, but they should be broken loose while the chain is still tight and in position.

    Use an opened end wrench on the cast hexagonal portion (1) of the camshaft to hold them in place while breaking the camshaft position actuator bolt (2) loose to prevent camshaft rotation.

  119. Camshaft Position Actuator Bolt (2) - Loosen
  120. GM5893492
    NOTE:

    Marking the relationship of the timing chain to actuators is critical for timing alignment.

    Clean off any oil residue on camshaft position actuators.

  121. Mark the position of the chain to the camshaft position actuators (1).
  122. GM5892595

    Camshaft Bearing Cap Bolt (1) - Remove [4x]

  123. Camshaft Bearing Cap (2) - Remove
  124. GM5895245

    Loosen the wingnut (1) to open the clamping area of EN-49982 - 1  Retainer.

  125. Install the EN-49982 - 1  Retainer (2) and hand tighten the thumbscrew (3).
  126. Tighten the wingnut (1) of the EN-49982  Timing Chain Retainer until it closes over and firmly grasps timing chain.
  127. GM5895269

    Insert the EN-49982 - 2  Retainer (1) between the two camshaft position actuators with the "teeth" on the EN-49982 - 2  Retainer facing toward the front cover.

  128. Once the wedge portion of the EN-49982 - 2  Retainer (1) is below the camshaft actuators, rotate the EN-49982 - 2  Retainer until the flat in the handle faces towards the intake camshaft position actuator.
  129. GM5895291

    Lower the EN-49982 - 2  Retainer (1) until it begins to engage the timing chain and timing cover casting.

  130. If possible shine a light down from above, between the camshaft position actuators, and the EN-49982 - 2  Retainer (1) to ensure retainer is seated in proper position.
  131. GM5895300
    NOTE:

    This rotation of the camshaft will compress the tensioner shoe against the spring force of the tensioner, opening up a gap between the chain and the internal rib in the front cover. The wedge will then drop into this gap and you will feel a distinct click as the teeth engage the chain.

    Use an opened end wrench on the cast hexagonal portion (1) rotate the camshaft toward the intake camshaft while pushing down on the handle of EN-49982 - 2  Retainer (1).

    132. CAUTION:

    Be sure the EN49982-2 is captured firmly as described before continuing. This is critical to ensuring the camshaft drive chains stay properly timed.

  132. Release the force on the wrench, allowing the spring tension to close the tensioner shoe against the wedge portion of EN49982-2  Retainer. You should be able to lightly tug on the EN - 49982-2  Retainer and it should stay in position. Repeat steps if necessary to re-insert the EN49982-2  Retainer until you are certain it is in position and will stay in position.
  133. GM5895371
    CAUTION:

    Do not pry against the face of the camshaft position actuators or the position actuator retaining bolts as the position actuators will be damaged.

    Position a suitable tool between a camshaft cap and camshaft lobe (1). Carefully move/pry the camshaft as far as possible toward the rear/flywheel end of the engine.

  134. GM5895406

    Camshaft Position Actuator Bolt (1) - Remove

  135. GM5895432

    Slide the camshaft position actuator (1) forward and off the end of the exhaust camshaft.

  136. GM5895438
    NOTE:

    DO NOT remove the EN-49982 - 1  Retainer, they are holding the camshaft timing chain to maintain the proper timed position.

    Tilt the camshaft position actuator (1) forward and out/away from the engine.

  137. GM5896919

    Camshaft Bearing Cap Bolt (1) - Remove [6x]

  138. Camshaft Bearing Cap (2) - Remove [3x]
  139. GM5896920

    Exhaust Camshaft (1) - Remove

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