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Home >> Cadillac >> 2021 >> CT4 V, RWD >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 2.7L (L3B) - Repair Instructions - Ct4 (2 Of 6) >> Intake Camshaft Replacement >> Removal Procedure

Removal Procedure

  1. Remove the oil fill cap.
  2. GM5432171Courtesy of GENERAL MOTORS COMPANY

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

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

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

  5. GM5456746Courtesy of GENERAL MOTORS COMPANY

    Intake Manifold Cover Bolt (1) - Remove

  6. GM5456829Courtesy of GENERAL MOTORS COMPANY

    Intake Manifold Cover Insulator (1) - Remove

    7. WARNING:

    Refer to Diesel/Gasoline Vapors Warning .

    WARNING:

    Refer to Safety Glasses Warning .

  7. Relieve the fuel system pressure. Fuel Pressure Relief
  8. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
  9. GM5129466Courtesy of GENERAL MOTORS COMPANY

    Fuel Feed Pipe Bolt (1) - Remove

  10. GM5129475Courtesy of GENERAL MOTORS COMPANY

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

  11. Fuel Feed Pipe (1) - Remove
  12. GM5457059Courtesy of GENERAL MOTORS COMPANY

    Electrical Connector (1) - Disconnect [5x]

  13. Wiring Harness (2) - Reposition
  14. GM5159484Courtesy of GENERAL MOTORS COMPANY

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

  15. GM5457857Courtesy of GENERAL MOTORS COMPANY

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

  16. Radiator Surge Tank Inlet Hose Clip (2) @ Upper Intake Manifold Bracket (3) - Remove
  17. GM5457786Courtesy of GENERAL MOTORS COMPANY

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

  18. Upper Intake Manifold Bracket (2) - Remove
  19. GM5404490Courtesy of GENERAL MOTORS COMPANY

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

  20. Ignition Coil (2) - Remove [4x]
  21. GM5512092Courtesy of GENERAL MOTORS COMPANY

    Electrical Connector (1) - Disconnect [2x]

  22. Retainer (2) - Unclip [5x]
  23. Engine Wiring Harness (3) - Reposition
  24. Positive Crankcase Ventilation Tube (4) - Disconnect - Plastic Collar Quick Connect Fitting Service
  25. GM5512093Courtesy of GENERAL MOTORS COMPANY

    Retainer (1) - Unclip

  26. GM5020482Courtesy of GENERAL MOTORS COMPANY

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

  27. Camshaft Position Actuator Magnet (2) - Remove [2x]
  28. Camshaft Position Actuator Magnet Gasket (3) - Remove and DISCARD [2x]
  29. GM5004054Courtesy of GENERAL MOTORS COMPANY

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

  30. Timing Chain Upper Cover Bolt (2) - Remove
    31. NOTE:

    Use pry points indicated by arrows.

  31. Timing Chain Upper Cover (3) - Remove
  32. Timing Chain Upper Cover Seal (4) - Remove and DISCARD
  33. GM5255373Courtesy of GENERAL MOTORS COMPANY

    Camshaft Cover Core Hole Plug (1) - Remove [2x]

  34. GM5256287Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Rotate the engine using the crankshaft balancer until the locking pins of the EN-52462-A  Camshaft Alignment Tool (1) drop into the slots in the camshafts.

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

  35. Insert the EN-52462-A  Camshaft Alignment Tool bolt (2) into the camshaft carrier and tighten to secure the tool to the camshaft carrier.
  36. GM5256386Courtesy of GENERAL MOTORS COMPANY

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

    37. 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.

  37. EN-52461-200  Camshaft Torque Reaction Tool 2.7L Adapter (2) - Install [2x]
  38. Install and tighten the 2 EN-52461-200  Camshaft Torque Reaction Tool 2.7L Adapter bolts (3) to secure the 2 EN-52461-200  Camshaft Torque Reaction Tool 2.7L Adapter (2) to the cylinder head.
  39. GM5257213Courtesy of GENERAL MOTORS COMPANY

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

  40. Install and tighten the 2 EN-52461  Camshaft Torque Reaction Tool bolts (3).
  41. GM5257293Courtesy of GENERAL MOTORS COMPANY

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

  42. Tighten the 2 EN-52461  Camshaft Torque Reaction Tool bolts (2) to lock the camshaft position intake and exhaust actuators in place.
  43. GM5257299Courtesy of GENERAL MOTORS COMPANY

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

    44. 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.
  44. Loosen the EN-52461  Camshaft Torque Reaction Tool bolt (2) to un-lock the camshaft position intake actuator.
  45. GM5257323Courtesy of GENERAL MOTORS COMPANY

    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.

    2. Tighten the EN-52461  Camshaft Torque Reaction Tool bolt (2) to lock the camshaft position intake actuator securely in place.
    3. Remove the wrench from EN-52461  Camshaft Torque Reaction Tool (1).
    4. Loosen the EN-52461  Camshaft Torque Reaction Tool bolt (3) to un-lock the camshaft position exhaust actuator.
    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.

    6. Tighten the EN-52461  Camshaft Torque Reaction Tool bolt (3) to lock the camshaft position exhaust actuator securely in place.
    7. Remove the wrench from EN-52461  Camshaft Torque Reaction Tool (4).
  46. GM5274568Courtesy of GENERAL MOTORS COMPANY

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

  47. GM5257323Courtesy of GENERAL MOTORS COMPANY

    Relieve timing chain tension from the camshaft position intake and exhaust actuators.

      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.
    1. Loosen the EN-52461  Camshaft Torque Reaction Tool bolt (2) to release the camshaft position intake actuator.
    2. Tighten the EN-52461  Camshaft Torque Reaction Tool bolt (2) to lock the camshaft position intake actuator securely in place.
    3. Loosen the EN-52461  Camshaft Torque Reaction Tool bolt (3) to release the camshaft position exhaust actuator.
    4. Tighten the EN-52461  Camshaft Torque Reaction Tool bolt (3) to lock the camshaft position exhaust actuator securely in place.
  48. GM5257330Courtesy of GENERAL MOTORS COMPANY

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

  49. GM5299877Courtesy of GENERAL MOTORS COMPANY
    NOTE:

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

    Loosen the bolt (1) holding in the camshaft position exhaust actuator (3), then slide the barrel (2) of the torque reaction tool away from the camshaft position exhaust actuator (3).

  50. NOTE:

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

  51. Loosen the bolt (1) holding in the camshaft position intake actuator (4), then slide the barrel (2) of the torque reaction tool away from the camshaft position intake actuator (4).
  52. GM5478561Courtesy of GENERAL MOTORS COMPANY

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

  53. Fuel Pump Shield Bolt (2) - Remove [2x]
  54. Fuel Injection Pump Bracket (3) - Remove
  55. GM5478583Courtesy of GENERAL MOTORS COMPANY
    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

  56. GM5404598Courtesy of GENERAL MOTORS COMPANY

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

  57. GM5404599Courtesy of GENERAL MOTORS COMPANY

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

  58. Fuel Feed Intermediate Pipe (2) - Remove and DISCARD
  59. Electrical Connector @ Fuel Pump - Disconnect
  60. GM5003980Courtesy of GENERAL MOTORS COMPANY
    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]

  61. Fuel Pump (2) - Remove
  62. Fuel Pump Seal (3) - Remove and DISCARD
  63. Valve Lifter Follower (4) - Remove
  64. GM5156637Courtesy of GENERAL MOTORS COMPANY

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

  65. Electrical Connector (2) @ Camshaft Carrier (3) - Disconnect [6x]
  66. GM5156644Courtesy of GENERAL MOTORS COMPANY

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

  67. Engine Wiring Harness Bracket (2) - Remove
  68. 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.

    Positive Crankcase Ventilation Tube (1) - Remove and DISCARD

  69. Remove the 2 EN-52461-200  Camshaft Torque Reaction Tool 2.7L Adapters, and the EN-52461  Camshaft Torque Reaction Tool.
  70. GM5004087Courtesy of GENERAL MOTORS COMPANY

    Camshaft Cover Stud (1) - Remove

  71. Camshaft Cover Stud (2) - Remove [16x]
  72. Camshaft Cover Bolt (3) - Remove [5x]
  73. Camshaft Carrier (4) - Remove
  74. Camshaft Cover Gasket (5) - Remove and DISCARD
  75. GM5517345Courtesy of GENERAL MOTORS COMPANY

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

  76. GM5043394Courtesy of GENERAL MOTORS COMPANY

    Camshaft Bearing Cap Bolt (1) - Remove [25x]

  77. Camshaft Bearing Lower Cap (2) - Remove
  78. Camshaft Bearing Lower Cap (3) - Remove
  79. Camshaft Bearing Front Cap (4) - Remove
  80. Ensure the 5 engine front cover locating pins (5) remain in place.
  81. GM5043397Courtesy of GENERAL MOTORS COMPANY

    Intake Camshaft (1) - Remove

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