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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 >> Timing Chain Tensioner 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. GM5432171

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

  4. Lift up on the front of the intake manifold cover (2).
  5. GM5432174

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

  6. GM5456746

    Intake Manifold Cover Bolt (1) - Remove

  7. GM5456829

    Intake Manifold Cover Insulator (1) - Remove

  8. GM5156329

    Use a suitable tool to rotate the drive belt tensioner (1) counterclockwise to relieve tension from the accessory drive primary belt (2) and hold.

  9. Accessory Drive Primary Belt (2) - Remove
  10. GM5003904

    Belt Idler Pulley (1) - Remove

  11. GM5500497

    Drive Belt Idler Pulley (2) - Remove

  12. GM5500583

    Drive Belt Tensioner Bolt (3) - Remove [2x]

  13. Drive Belt Tensioner (4) - Remove
  14. Raise and support the vehicle. Lifting and Jacking the Vehicle
  15. Drain the cooling system. Refer to Cooling System Draining and Filling (L3B Static Fill) , or Cooling System Draining and Filling (L3B GE 47716)
  16. Drain the engine oil. Engine Oil and Oil Filter Replacement (RWD)
  17. GM5404490

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

  18. Ignition Coil (2) - Remove [4x]
  19. GM5395515

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

  20. GM5512092

    Electrical Connector (1) - Disconnect [2x]

  21. Retainer (2) - Unclip [5x]
  22. Engine Wiring Harness (3) - Reposition
  23. Positive Crankcase Ventilation Tube (4) - Disconnect - Plastic Collar Quick Connect Fitting Service
  24. GM5512093

    Retainer (1) - Unclip

  25. GM5398955

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

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

    Air Cleaner Outlet Duct (1) - Remove

  28. If replacing air cleaner outlet duct transfer parts as necessary.
  29. GM5396452

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

  30. Engine Oil Cooler Coolant Outlet Hose (2) @ Engine Oil Cooler - Remove
  31. Engine Oil Cooler Coolant Inlet Hose (3) @ Engine Oil Cooler - Remove
  32. GM5396459

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

  33. GM5396466

    Engine Oil Cooler (1) - Remove

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

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

  37. Auxiliary Generator Battery Jumper Cable (2) - Reposition away
  38. Retainer (3) - Disengage
  39. GM5417249

    Starter Stud (1) - Remove

  40. Starter Bolt (2) - Remove [2x]
  41. Reposition the starter to gain access to the electrical connections.
  42. GM5417288

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

  43. Auxiliary Generator Battery Jumper Cable (2) - Remove
  44. Electrical Connector (4) - Disconnect
  45. Starter (3) - Remove
  46. 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.

  47. GM5020482

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

  48. Camshaft Position Actuator Magnet (2) - Remove [2x]
  49. Camshaft Position Actuator Magnet Gasket (3) - Remove and DISCARD [2x]
  50. GM5004054

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

  51. Timing Chain Upper Cover Bolt (2) - Remove
    52. NOTE:

    Use pry points indicated by arrows.

  52. Timing Chain Upper Cover (3) - Remove
  53. Timing Belt Front Upper Cover Seal (4) - Remove and DISCARD
  54. GM5002064

    Camshaft Carrier Bolt (2) - Remove

  55. Camshaft Cover Core Hole Plug (1) - Remove [2x]
  56. 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

  57. Insert the EN-52462-A  Camshaft Alignment Tool bolt (2) into the camshaft carrier and tighten to secure the tool to the camshaft carrier.
  58. GM5003927

    Crankshaft Balancer Bolt (1) - Remove and DISCARD

  59. Crankshaft Balancer (2) - Remove
  60. GM5004060

    Engine Front Cover Bolt (1) - Remove [10x]

  61. Engine Front Cover (2) - Remove and DISCARD
  62. The engine block sealing surface must be cleaned with low VOC brake clean, allow it to sit on the surface for several minutes to loosen the RTV. Use a plastic putty knife or plastic scraper to remove the old RTV. Once the RTV is removed, spray a second application of low VOC brake cleaner to the sealing surface on the engine block, wipe off with a clean lint free cloth. Wipe the new cover with low VOC brake clean on the sealing surface / bead path, then wipe it off with a clean lint free cloth.
  63. Clean out the engine front cover locating pin bores with low VOC brake clean and then dry them out with shop air.
  64. 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.

    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).

  65. GM5256386

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

    66. 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.

  66. EN-52461-200  Camshaft Torque Reaction Tool 2.7L Adapter (2) - Install [2x]
  67. 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.
  68. GM5257213

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

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

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

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

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

    73. 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.
  73. Loosen the EN-52461  Camshaft Torque Reaction Tool bolt (2) to un-lock the intake actuator.
  74. Loosen the EN-52461  Camshaft Torque Reaction Tool bolt (4) to un-lock the exhaust actuator.
  75. 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. GM5257323

      Relieve timing chain tension from the camshaft position actuators.

      10. 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.
    10. Loosen the EN-52461  Camshaft Torque Reaction Tool bolt (2) to release the intake actuator.
    11. Loosen the EN-52461  Camshaft Torque Reaction Tool bolt (3) to release the exhaust actuator.
    12. GM5257330

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

  76. GM5512284
    NOTE:

    The timing chain tensioner plunger is spring loaded, hold the plunger in place as the tensioner is removed to prevent losing components of the timing chain tensioner.

    EN-52593  Chain Tensioner Retention Pin - Install

  77. Timing Chain Tensioner Bolt (1) - Remove [2x]
  78. Timing Chain Tensioner (2) - Remove
  79. Timing Chain Tensioner Gasket (3) - Remove and DISCARD
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