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Home >> Cadillac >> 2021 >> CT4 V, 4WD >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 2.7L (L3B) - Repair Instructions - Ct4 (4 Of 6) >> Cylinder Head Replacement >> Installation Procedure

Installation Procedure

  1. GM5043852Courtesy of GENERAL MOTORS COMPANY

    Can use Low VOC Brake Cleaner to ensure the surface areas are clean. Adhesives, Fluids, Lubricants, and Sealers

  2. EN-46109  Guide Pins - Install
  3. Apply a 3 mm wide RTV bead along the edge of the cylinder head. Path is perpendicular to the crank axis. Bead is centered 2.5 mm back from front edge of head. Bead runs the entire length of sealing surface across sealing land on both sides.
  4. Camshaft Cover Gasket (1) - Install NEW
  5. GM5022866Courtesy of GENERAL MOTORS COMPANY

    Camshaft Cover (1) - Install

    NOTE:

    Ensure the EN-52462 - A  Camshaft Tool is installed and camshafts are in the time position.

  6. Rock the camshaft carrier back and fourth to seat the camshaft carrier cover onto the two dowels in the cylinder head sealing surface.
  7. EN-46109  Guide Pins (2) - Remove
  8. GM5004087Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to Fastener Caution .

    Camshaft Cover Bolt (3) - Install and hand tighten [5x]

  9. Camshaft Cover Stud (2) - Install and hand tighten [16x]
  10. Camshaft Cover Stud (1) - Install and hand tighten
  11. Tighten the camshaft carrier fasteners in sequence. Fastener Specifications
  12. Reinstall the 2 EN-52461-200  Camshaft Torque Reaction Tool 2.7L Adapters, and the EN-52461  Camshaft Torque Reaction Tool.
  13. GM5156836Courtesy of GENERAL MOTORS COMPANY

    Positive Crankcase Ventilation Tube (1) - Install NEW

  14. GM5156644Courtesy of GENERAL MOTORS COMPANY

    Engine Wiring Harness Bracket (2) - Install

  15. Engine Wiring Harness Bracket Nut (1) - Install and tighten [2x] - Fastener Specifications
  16. GM5156637Courtesy of GENERAL MOTORS COMPANY

    Electrical Connector (2) @ Camshaft Carrier (3) - Connect [6x]

  17. Electrical Connector (1) @ Camshaft Carrier (3) - Connect [6x]
  18. GM5022674Courtesy of GENERAL MOTORS COMPANY
    NOTE:
    • The camshaft MUST be at the base circle position before the fuel pump is installed.
    • At the base circle position, the EN-52443  High Pressure Fuel Pump Alignment Tool will sit flush with the cylinder head.

    Install the EN-52443  High Pressure Fuel Pump Alignment Tool and turn the crankshaft until the camshaft lobe is at the base circle position.

  19. Remove the EN-52443  High Pressure Fuel Pump Alignment Tool.
  20. Lubricate the valve lifter follower (4) with clean engine oil.
  21. Valve Lifter Follower (4) - Install
  22. Fuel Pump Seal (3) - Install NEW
  23. Fuel Pump (2) - Install
    24. CAUTION:

    Alternately hand-tighten the fuel pump bolts one turn at a time until the pump is fully seated. Trying to draw down the pump without even side-to-side tightening may result in pump plunger damage.

    CAUTION:

    Fastener Caution

  24. Fuel Pump Stud (1) - Install and tighten [2x] - Fastener Specifications
  25. Electrical Connector @ Fuel Pump - Connect
  26. 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) - Install

  27. GM5478561Courtesy of GENERAL MOTORS COMPANY

    Fuel Injection Pump Bracket (3) - Install

  28. Fuel Pump Shield Bolt (2) - Install and tighten [2x] - Fastener Specifications
  29. Fuel Pump Shield Bolt (1) - Install and tighten [2x] - Fastener Specifications
  30. GM5404599Courtesy of GENERAL MOTORS COMPANY

    Fuel Feed Intermediate Pipe (2) - Install NEW

    31. CAUTION:

    Fastener Caution

  31. Fuel Injection Fuel Feed Pipe Bracket Bolt (1) - Install and tighten - Fastener Specifications
  32. GM5404598Courtesy of GENERAL MOTORS COMPANY

    Nut @ Fuel Feed Intermediate Pipe (1) - Install and hand tighten [2x]

  33. Nut @ Fuel Feed Intermediate Pipe (1) - Tighten [2x] - Fastener Specifications
  34. GM5299894Courtesy of GENERAL MOTORS COMPANY

    Install the camshaft position exhaust actuator (3).

  35. Slide the barrel of the torque reaction tool (2) into the camshaft position exhaust actuator (3) and hold.
    36. NOTE:

    Ensure the torque reaction tool bolt (1) is tight enough that the barrel (2) will not slip.

  36. Tighten the bolt (1) to hold the camshaft position exhaust actuator (3) in place.
  37. Install the camshaft position intake actuator (4).
  38. Slide the barrel of the torque reaction tool (2) into the camshaft position intake actuator (4) and hold.
    39. NOTE:

    Ensure the torque reaction tool bolt (1) is tight enough that the barrel (2) will not slip.

  39. Tighten the bolt (1) to hold the camshaft position intake actuator (4) in place.
  40. GM5257435Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Lubricate under the washer surface.

    Lubricate the NEW camshaft position actuator valve solenoid bolts (1) with clean engine oil where indicated. Adhesives, Fluids, Lubricants, and Sealers

  41. GM5257330Courtesy of GENERAL MOTORS COMPANY

    Install and hand tighten the NEW camshaft position actuator valve solenoid bolts (1).

  42. GM5274568Courtesy of GENERAL MOTORS COMPANY

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

  43. GM5257414Courtesy of GENERAL MOTORS COMPANY
    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 is loosened or removed.
    • The EN-52461  Camshaft Torque Reaction Tool bolts (2, 3) are loosened.

    Shift the slack in the timing chain to be taken up by the timing chain tensioner.

    1. Loosen the EN-52461  Camshaft Torque Reaction Tool bolt (2).
    2. Use a wrench to turn the EN-52461  Camshaft Torque Reaction Tool (1) counter-clockwise 6 N.m (53 lb in), then hold.
    3. Tighten the EN-52461  Camshaft Torque Reaction Tool bolt (2) to lock the camshaft position intake actuator securely in place.
    4. Remove the wrench from EN-52461  Camshaft Torque Reaction Tool (1).
    5. Loosen the EN-52461  Camshaft Torque Reaction Tool bolt (3).
    6. Use a wrench to turn the EN-52461  Camshaft Torque Reaction Tool (4) counter-clockwise 6 N.m (53 lb in), then hold.
    7. Tighten the EN-52461  Camshaft Torque Reaction Tool bolt (3) to lock the camshaft position intake actuator securely in place.
    8. Remove the wrench from EN-52461  Camshaft Torque Reaction Tool (4).
  44. GM5257299Courtesy of GENERAL MOTORS COMPANY

    Tighten the NEW camshaft position actuator valve solenoid bolts (1). Fastener Specifications

  45. GM5257293Courtesy of GENERAL MOTORS COMPANY

    Loosen the 2 EN-52461  Camshaft Torque Reaction Tool bolts (2) to un-lock the camshaft position actuators.

  46. Disengage the tangs of the EN-52461  Camshaft Torque Reaction Tool (1) from the camshaft position intake and exhaust actuator slots.
  47. GM5257213Courtesy of GENERAL MOTORS COMPANY

    Remove the 2 EN-52461  Camshaft Torque Reaction Tool bolts (3).

  48. EN-52461  Camshaft Torque Reaction Tool (1) @ EN-52461-200  Camshaft Torque Reaction Tool 2.7L Adapter (2) - Remove
  49. GM5256386Courtesy of GENERAL MOTORS COMPANY

    Remove the 2 EN-52461-200  Camshaft Torque Reaction Tool 2.7L Adapter bolts (3).

  50. EN-52461-200  Camshaft Torque Reaction Tool 2.7L Adapter (2) - Remove [2x]
  51. Rotate both handles (4) of the EN-52462-A  Camshaft Alignment Tool towards the front of the engine.
  52. GM5256287Courtesy of GENERAL MOTORS COMPANY

    Loosen and disengage the EN-52462-A  Camshaft Alignment Tool bolt (2) from camshaft carrier.

  53. EN-52462-A  Camshaft Alignment Tool (1) - Remove
  54. GM5255373Courtesy of GENERAL MOTORS COMPANY

    Clean and apply sealant to the camshaft cover core hole plug (1) [2x]. Adhesives, Fluids, Lubricants, and Sealers

  55. Camshaft Cover Core Hole Plug (1) - Install and tighten [2x] - Fastener Specifications
  56. GM5022287Courtesy of GENERAL MOTORS COMPANY

    Ensure the 2 engine front cover locating pins (1) are in place.

  57. Timing Chain Upper Cover Seal (2) - Install NEW
  58. GM5512168Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Ensure that the sealing surface is clear of oil, grease and old sealant material.

    NOTE:

    Ensure proper use of room temperature vulcanizing (RTV) sealant. Use of Room Temperature Vulcanizing (RTV) and Anaerobic Sealant

    NOTE:

    The timing chain upper cover must be installed within 8 minutes of the RTV sealant application.

    Apply room temperature vulcanizing (RTV) sealant at the seam between the camshaft housing and the cylinder head where indicated.

  59. GM5022287Courtesy of GENERAL MOTORS COMPANY

    Timing Chain Upper Cover (3) - Install

  60. Timing Chain Upper Cover Bolt (4) - Install and hand tighten [9x]
  61. Timing Chain Upper Cover Bolt (5) - Install and hand tighten
  62. Timing Chain Upper Cover Bolt (4, 5) - Tighten in sequence [10x] - Fastener Specifications
  63. GM5020482Courtesy of GENERAL MOTORS COMPANY

    Camshaft Position Actuator Magnet Gasket (3) - Install NEW [2x]

  64. Camshaft Position Actuator Magnet (2) - Install [2x]
  65. Camshaft Position Actuator Magnet Bolt (1) - Install [4x] - Fastener Specifications
  66. GM5512093Courtesy of GENERAL MOTORS COMPANY

    Retainer (1) - Install

  67. GM5512092Courtesy of GENERAL MOTORS COMPANY

    Positive Crankcase Ventilation Tube (4) - Connect - Plastic Collar Quick Connect Fitting Service

  68. Engine Wiring Harness (3) - Reposition
  69. Retainer (2) - Install [5x]
  70. Electrical Connector (1) - Connect [2x]
  71. GM5404490Courtesy of GENERAL MOTORS COMPANY

    Ignition Coil (2) - Install [4x]

  72. Ignition Coil Bolt (1) - Install and tighten [8x] - Fastener Specifications
  73. GM5457786Courtesy of GENERAL MOTORS COMPANY

    Upper Intake Manifold Bracket (2) - Install

  74. Upper Intake Manifold Cover Nut (1) - Install and tighten [2x] - Fastener Specifications
  75. GM5457857Courtesy of GENERAL MOTORS COMPANY

    Radiator Surge Tank Inlet Hose Clip (2) @ Upper Intake Manifold Bracket (3) - Install

  76. Upper Intake Manifold Cover Nut (1) - Install and tighten [2x] - Fastener Specifications
  77. GM5159484Courtesy of GENERAL MOTORS COMPANY

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

  78. GM5457059Courtesy of GENERAL MOTORS COMPANY

    Wiring Harness (2) - Reposition

  79. Electrical Connector (1) - Connect [5x]
  80. GM5129475Courtesy of GENERAL MOTORS COMPANY

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

  81. GM5129466Courtesy of GENERAL MOTORS COMPANY

    Fuel Feed Pipe Bolt (1) - Install and tighten - Fastener Specifications

  82. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection
    83. WARNING:

    Refer to Diesel/Gasoline Vapors Warning .

    WARNING:

    Refer to Safety Glasses Warning .

  83. Pressurize the fuel system and inspect for leaks.
  84. GM5456829Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Ensure the intake manifold cover insulator retainers fully engage the intake manifold cover studs.

    Intake Manifold Cover Insulator (1) - Install

  85. GM5456746Courtesy of GENERAL MOTORS COMPANY

    Intake Manifold Cover Bolt (1) - Install - Fastener Specifications

  86. GM5432174Courtesy of GENERAL MOTORS COMPANY

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

  87. GM5432171Courtesy of GENERAL MOTORS COMPANY

    Push down on the front of the intake manifold cover (2).

  88. Intake Manifold Cover Bolt (1) - Install [2x] - Fastener Specifications
  89. Install the oil fill cap.
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