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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 >> Intake Camshaft Replacement >> 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. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
  2. Remove the oil fill cap.
  3. Drain the cooling system. Refer to Cooling System Draining and Filling (L3B Static Fill) , or Cooling System Draining and Filling (L3B GE 47716)
  4. Drain the engine oil. Engine Oil and Oil Filter Replacement (RWD)
  5. GM5432171

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

  6. Lift up on the front of the intake manifold cover (2).
  7. GM5432174

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

  8. GM5456746

    Intake Manifold Cover Bolt (1) - Remove

  9. GM5456829

    Intake Manifold Cover Insulator (1) - Remove

    10. WARNING:

    Refer to Diesel/Gasoline Vapors Warning .

    WARNING:

    Refer to Safety Glasses Warning .

  10. Relieve the fuel system pressure. Fuel Pressure Relief
  11. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
  12. GM5129466

    Fuel Feed Pipe Bolt (1) - Remove

  13. GM5129475

    Disconnect the fuel feed pipe (1) from the fuel pump and the fuel feed pipe - underbody. Metal Collar Quick Connect Fitting Service

  14. Fuel Feed Pipe (1) - Remove
  15. GM5457059

    Electrical Connector (1) - Disconnect [5x]

  16. Wiring Harness (2) - Reposition
  17. GM5159484

    Retainer (1) @ Upper Intake Manifold Bracket (2) - Unclip [4x]

  18. GM5457857

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

  19. Radiator Surge Tank Inlet Hose Clip (2) @ Upper Intake Manifold Bracket (3) - Remove
  20. GM5457786

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

  21. Upper Intake Manifold Bracket (2) - Remove
  22. GM5404490

    Ignition Coil Bolt (1) - Remove [8x]

  23. Ignition Coil (2) - Remove [4x]
  24. GM5395515

    Evaporative Emission Canister Purge Tube (1) - Remove - Plastic Collar Quick Connect Fitting Service

  25. GM5512092

    Electrical Connector (1) - Disconnect [2x]

  26. Retainer (2) - Unclip [5x]
  27. Engine Wiring Harness (3) - Reposition
  28. Positive Crankcase Ventilation Tube (4) - Disconnect - Plastic Collar Quick Connect Fitting Service
  29. GM5512093

    Retainer (1) - Unclip

  30. GM5398955

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

  31. Positive Crankcase Ventilation Tube (3) - Disconnect - Plastic Collar Quick Connect Fitting Service
  32. GM5398967

    Air Cleaner Outlet Duct (1) - Remove

  33. If replacing air cleaner outlet duct transfer parts as necessary.
  34. GM5396452

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

  35. Engine Oil Cooler Coolant Outlet Hose (2) @ Engine Oil Cooler - Remove
  36. Engine Oil Cooler Coolant Inlet Hose (3) @ Engine Oil Cooler - Remove
  37. GM5396459

    Engine Oil Cooler Bolt (1) - Remove [4x]

  38. GM5396466

    Engine Oil Cooler (1) - Remove

  39. Engine Oil Cooler Seal (2) - Remove and DISCARD [2x]
  40. Reposition any hoses that will impede the removal of the starter.
  41. GM5417233

    Auxiliary Generator Battery Jumper Cable Terminal Nut (1) - Remove

  42. Auxiliary Generator Battery Jumper Cable (2) - Reposition away
  43. Retainer (3) - Disengage
  44. GM5417249

    Starter Stud (1) - Remove

  45. Starter Bolt (2) - Remove [2x]
  46. Reposition the starter to gain access to the electrical connections.
  47. GM5417288

    Battery Positive Cable Nut (1) @ Starter Solenoid - Remove

  48. Auxiliary Generator Battery Jumper Cable (2) - Remove
  49. Electrical Connector (4) - Disconnect
  50. Starter (3) - Remove
  51. GM5164169
    NOTE:

    The timing pin (3) is installed into the flexplate for engine timing procedures, it can be damaged if torque is applied to the flexplate with the timing pin engaged. The pin must be placed in the retracted position before torque is applied to the flexplate.

    Install the EN-52476  Flywheel Lock and Alignment Tool (2) through the starter mounting hole.

  52. Remove the slide (4) of the EN-52476  Flywheel Lock and Alignment Tool (2) and install the timing pin (3) by releasing the handle (1).
  53. GM5020482

    Camshaft Position Actuator Magnet Bolt (1) - Remove [4x]

  54. Camshaft Position Actuator Magnet (2) - Remove [2x]
  55. Camshaft Position Actuator Magnet Gasket (3) - Remove and DISCARD [2x]
  56. GM5004054

    Timing Chain Upper Cover Bolt (1) - Remove [9x]

  57. Timing Chain Upper Cover Bolt (2) - Remove
    58. NOTE:

    Use pry points indicated by arrows.

  58. Timing Chain Upper Cover (3) - Remove
  59. Timing Belt Front Upper Cover Seal (4) - Remove and DISCARD
  60. GM5002064

    Camshaft Carrier Bolt (2) - Remove

  61. Camshaft Cover Core Hole Plug (1) - Remove [2x]
  62. GM5256287
    NOTE:

    The EN-52462-A  Camshaft Alignment Tool locking pins fit tightly into the camshafts. Rotate the engine in both directions in small increments using the crankshaft balancer bolt until the locking pins of the EN-52462-A  Camshaft Alignment Tool (1) drop into the slots in the camshafts. Momentarily retract the timing pin of the EN-52476  Flywheel Lock and Alignment Tool as necessary to seat the EN-52462-A  Camshaft Alignment Tool locking pins. Ensure the EN-52476  Flywheel Lock and Alignment Tool timing pin is re-engaged into the automatic transmission flex plate.

    EN-52462-A  Camshaft Alignment Tool (1) - Install

  63. Insert the EN-52462-A  Camshaft Alignment Tool bolt (2) into the camshaft carrier and tighten to secure the tool to the camshaft carrier.
  64. GM5256386

    Rotate both handles (4) of the EN-52462-A  Camshaft Alignment Tool towards the rear of the engine as shown.

    65. NOTE:

    Ensure the camshaft carrier and cylinder head face are clean and free from RTV prior to installing the EN-52461-200  Camshaft Torque Reaction Tool 2.7L Adapter.

  65. EN-52461-200  Camshaft Torque Reaction Tool 2.7L Adapter (2) - Install [2x]
  66. Install and tighten the two EN-52461-200  Camshaft Torque Reaction Tool 2.7L Adapter bolts (3) enough to secure the EN-52461-200  Camshaft Torque Reaction Tool 2.7L Adapter (2) to the cylinder head.
  67. GM5257213

    EN-52461  Camshaft Torque Reaction Tool (1) @ EN-52461-200  Camshaft Torque Reaction Tool 2.7L Adapter (2) - Install

  68. Install and tighten the 2 EN-52461  Camshaft Torque Reaction Tool bolts (3).
  69. GM5257293

    Engage the tangs of the EN-52461  Camshaft Torque Reaction Tool (1) to the intake and the exhaust camshaft position actuator slots.

  70. Tighten the EN-52461  Camshaft Torque Reaction Tool bolts (2) to lock the actuators in place.
  71. GM5257299

    Loosen the camshaft position actuator valve solenoid bolts (1).

    72. CAUTION:

    Hold the camshaft position actuator firmly and squarely during camshaft position actuator valve solenoid bolt removal/installation. Failure to do so may result in damage to the inside of the camshaft position actuator.

    NOTE:

    Pressure must be applied towards the engine on the EN-52461  Camshaft Torque Reaction Tool at points (3) prior to and during any time the following two conditions are simultaneously met.

    • The camshaft position actuator valve solenoid bolt (1) is loosened or removed.
    • The EN-52461  Camshaft Torque Reaction Tool bolts (2, 4) are loosened.
  72. Loosen the EN-52461  Camshaft Torque Reaction Tool bolt (2) to un-lock the intake actuator.
  73. Loosen the EN-52461  Camshaft Torque Reaction Tool bolt (4) to un-lock the exhaust actuator.
  74. GM5257323

    Remove timing chain tension from the camshaft position actuators and tighten the lower portion of the timing chain around the crankshaft sprocket.

    1. Use a wrench to turn the EN-52461  Camshaft Torque Reaction Tool (1) counter-clockwise 6 N.m 53 lb in, then hold.
      2. NOTE:

      Ensure the EN-52461  Camshaft Torque Reaction Tool bolt (2) is tightened enough that EN-52461  Camshaft Torque Reaction Tool (1) is firmly clamped and will not slip.

    3. Tighten the EN-52461  Camshaft Torque Reaction Tool bolt (1) to lock the intake actuator securely in place.
    4. Remove the wrench from EN-52461  Camshaft Torque Reaction Tool (1).
    5. Use a wrench to turn the EN-52461  Camshaft Torque Reaction Tool (4) clockwise 6 N.m 53 lb in, then hold.
      6. NOTE:

      Ensure the EN-52461  Camshaft Torque Reaction Tool bolt (3) is tightened enough that EN-52461  Camshaft Torque Reaction Tool (4) is firmly clamped and will not slip.

    7. Tighten the EN-52461  Camshaft Torque Reaction Tool bolt (2) to lock the exhaust actuator securely in place.
    8. Remove the wrench from EN-52461  Camshaft Torque Reaction Tool (4).
    9. GM5274568

      EN-52436  Timing Chain Tensioner Retention Tool (1) @ Timing Chain (2) - Install

    10. GM5257323

      Relieve timing chain tension from the camshaft position actuators.

      11. NOTE:

      Pressure must be applied towards the engine on the EN-52461  Camshaft Torque Reaction Tool at points (1, 4) prior to and during any time the following two conditions are simultaneously met.

      • The camshaft position actuator valve solenoid bolt is loosened or removed.
      • The EN-52461  Camshaft Torque Reaction Tool bolts (2, 3) are loosened.
    11. Loosen the EN-52461  Camshaft Torque Reaction Tool bolt (2) to release the intake actuator.
    12. Loosen the EN-52461  Camshaft Torque Reaction Tool bolt (3) to release the exhaust actuator.
    13. GM5257330
      NOTE:

      Only remove the camshaft position actuator valve bolts that are defective, or as necessary to remove their corresponding actuators.

      Remove the camshaft position actuator valve solenoid bolts (1) and DISCARD.

    14. GM5299877
      NOTE:

      Hold the bottom of the actuator while disengaging the torque reaction tool to prevent the actuator from dropping.

      Slide the barrel (2) of the torque reaction tool away from the actuators.

    15. Remove the exhaust camshaft position actuator (3) and the intake camshaft position actuator (4).
  75. GM5478561

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

  76. Fuel Pump Shield Bolt (2) - Remove [2x]
  77. Fuel Injection Pump Bracket (3) - Remove
  78. GM5478583
    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 Pump Insulator (1) - Remove

  79. GM5404598

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

  80. GM5404599

    Fuel Injection Fuel Feed Pipe Bracket Bolt (1) - Remove

  81. Fuel Feed Intermediate Pipe (2) - Remove and DISCARD
  82. Electrical Connector @ Fuel Pump - Disconnect
  83. GM5003980
    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 Stud (1) - Remove [2x]

  84. Fuel Pump (2) - Remove
  85. Fuel Pump Seal (3) - Remove and DISCARD
  86. Valve Lifter Follower (4) - Remove
  87. GM5156637

    Electrical Connector (1) @ Camshaft Carrier (3) - Disconnect [6x]

  88. Electrical Connector (2) @ Camshaft Carrier (3) - Disconnect [6x]
  89. GM5156644

    Engine Wiring Harness Bracket Nut (1) - Remove [2x]

  90. Engine Wiring Harness Bracket (2) - Remove
  91. 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.

    Positive Crankcase Ventilation Tube (1) - Remove and DISCARD

  92. GM5257213

    Loosen the two bolts (3) of EN-52461-200  Camshaft Torque Reaction Tool 2.7L Adapter.

  93. Remove EN-52461  Camshaft Torque Reaction Tool (1).
  94. GM5256386

    Remove the two EN-52461-200  Camshaft Torque Reaction Tool 2.7L Adapter bolts (3).

  95. EN-52461-200  Camshaft Torque Reaction Tool 2.7L Adapter - Remove [2x]
  96. GM5004087

    Camshaft Cover Stud (1) - Remove

  97. Camshaft Cover Stud (2) - Remove [16x]
  98. Camshaft Cover Bolt (3) - Remove [5x]
  99. Camshaft Carrier (4) - Remove
  100. Camshaft Cover Gasket (5) - Remove and DISCARD
  101. GM5517345

    EN-52462-A  Camshaft Alignment Tool (1) - Remove

  102. GM5517384

    Camshaft Bearing Cap Bolt (1) - Remove [12x]

  103. Camshaft Bearing Lower Cap (2) - Remove
  104. Camshaft Bearing Lower Cap (3) - Remove
  105. Engine Front Cover Locating Pin (4) - Remove [4x]
  106. GM5517385

    Intake Camshaft (1) - Remove

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