LEMON Manuals: Even more car manuals for everyone
Home >> Cadillac >> 2021 >> CT4 Sport, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 60 (Engine Controls And Fuel - 2.7L (L3B) - Repair Instructions) >> Repair Instructions >> Fuel Injector Wiring Harness Replacement >> Installation Procedure

Installation 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. GM5064708
    NOTE:

    When installing the connectors, ensure the connector position assurance (CPA) tab is engaged for each connector.

    Install the fuel injector wiring harness (2) and connect to appropriate fuel injectors and fuel pressure sensor.

  2. Install NEW fuel injector wiring harness straps (1).
  3. GM4840511
    NOTE:

    DO NOT use any type of lubricant when installing the NEW fuel injector nozzle housing seals on the fuel injector tip.

    Install EN-51955-1  Long Protector (1) onto the fuel injector tip, covering the first recessed area closest to the tip. Place a NEW fuel injector nozzle housing seal (2) on EN-51955-1  Long Protector (1).

  4. Using EN-51955-4  Pusher (3), install the fuel injector nozzle housing seal (2) into the recessed area (4) of the fuel injector, then remove the EN-51955-1  Long Protector.
  5. Compress the fuel injector nozzle housing seal (2) using EN-51955-3  Pre-Sizer (5).
  6. Using EN-51955-5  Sizer (6), resize the fuel injector nozzle housing seal.
  7. Install EN-51955-2  Short Protector (7) onto the fuel injector tip. Place a second NEW fuel injector nozzle housing seal (8) on EN-51105-2  Short Protector (7).
  8. Using EN-51955-4  Pusher (3), install the fuel injector nozzle housing seal (8) into the remaining recessed area (9) of the fuel injector, then remove EN-51105-2  Short Protector.
  9. Compress the fuel injector nozzle housing seal (8) using EN-51955-3  Pre-Sizer (5).
  10. Using EN-51955-5  Sizer (6), resize the fuel injector nozzle housing seal.
  11. GM2918356
    NOTE:

    The fuel injector nozzle housing seals must fit properly in the relative groove. Overlapping of the fuel injector nozzle housing seals with the external surface of the injector must be avoided.

    Check both of the fuel injector nozzle housing seals on each fuel injector for correct seat:

    • The fuel injector nozzle housing seal must not be too large, buckled, or corrugated (1)
    • The fuel injector nozzle housing seal must be fixed tight and accurate (2)
  12. If the fuel injector nozzle housing seals are not installed correctly, remove the incorrect fuel injector nozzle housing seal and replace with a NEW fuel injector nozzle housing seal.
  13. GM5133846
    CAUTION:

    During the installation of the fuel rail and injector assembly, ensure that the fuel injectors are positioned straight into the injector opening. Failure to follow this caution can tilt or bend the injectors and could cause leaks or malfunction after installation.

    NOTE:

    Hand place the fuel injection fuel rail into the position on the cylinder head.

    Fuel Injection Fuel Rail (1) - Move into position

    14. NOTE:

    Install the four fuel injection fuel rail bolts hand tight only, DO NOT apply any torque.

  14. Fuel Injection Fuel Rail Bolt (2) - Install and hand tighten [4x]
  15. Tighten the two outer fuel injection fuel rail bolts by alternating in steps of 1/2 turn, until the fuel injection fuel rail (1) is fully seated.
    16. CAUTION:

    Refer to Fastener Caution .

  16. Fuel Injection Fuel Rail Bolt (2) - Tighten [4x] - Fastener Specifications
  17. Electrical Connector (3) - Connect [3x]
  18. GM5132483
    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 Injection Fuel Rail Noise Shield (1) - Install

  19. GM5404599

    Fuel Feed Intermediate Pipe (2) - Install NEW

    20. CAUTION:

    Fastener Caution

  20. Fuel Injection Fuel Feed Pipe Bracket Bolt (1) - Install and tighten - Fastener Specifications
  21. GM5404598

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

  22. Nut @ Fuel Feed Intermediate Pipe (1) - Tighten [2x] - Fastener Specifications
  23. GM5399689

    Engine Coolant Flow Control Valve Seal (2) - Install NEW

  24. Engine Coolant Flow Control Valve (1) - Install
  25. GM5399685

    Engine Coolant Flow Control Valve Bolt (1) - Install [5x] - Fastener Specifications

  26. GM5399683

    Electrical Connector (2) @ Engine Coolant Flow Control Valve - Connect [2x]

  27. Electrical Connector (1) @ Engine Coolant Temperature Sensor - Connect
  28. GM5399673

    Engine Coolant Thermostat Housing Inlet Pipe (3) @ Engine Coolant Flow Control Valve - Install

  29. Exhaust Manifold Outlet Pipe (2) @ Engine Coolant Flow Control Valve - Install
  30. Hose Clamp (1) - Engage [2x] - Hose Clamp Replacement Guidelines - Spring Type
  31. GM5399671

    Engine Oil Cooler Coolant Inlet Hose (4) @ Engine Coolant Flow Control Valve - Install

  32. Radiator Inlet Hose (3) @ Engine Coolant Flow Control Valve - Install
  33. Thermostat Bypass Pipe (2) @ Engine Coolant Flow Control Valve - Install
  34. Hose Clamp (1) - Engage [3x] - Hose Clamp Replacement Guidelines - Spring Type
  35. GM5045008

    Crankcase Vent Passage Seal (4) - Install NEW

  36. Intake Manifold Gasket (3) - Install NEW [4x]
  37. GM5507557

    Intake Manifold (1) - Install

  38. GM5508646

    Intake Manifold Bolt (1) - Install and tighten [6x] - Fastener Specifications

  39. GM5507451

    Retainer (1) - Install

  40. GM5399157

    Charge Air Cooler Outlet Air Tube (2) @ Throttle Body (3) - Install

  41. Retainer Spring (1) - Engage
  42. GM5507441

    Upper Intake Manifold Cover (1) - Install

  43. GM5507437

    Intake Manifold Cover Stud (2) - Install and tighten [3x] - Fastener Specifications

  44. Intake Manifold Cover Bolt (1) - Install and tighten [2x] - Fastener Specifications
  45. GM5402098

    Evaporative Emission Canister Purge Pump (2) - Install

  46. Evaporative Emission Canister Purge Pump Bolt (1) - Install and tighten [3x] - Fastener Specifications
  47. GM5504108

    Engine Wiring Harness (4) - Reposition

  48. Retainer (3) - Install [4x]
  49. Electrical Connector (2) - Connect [2x]
  50. Engine Wiring Harness Bolt (1) - Install and tighten - Fastener Specifications
  51. GM5509132

    Throttle Body Electrical Connector (1) - Connect

  52. GM5504095

    Radiator Surge Tank Inlet Hose (3) - Reposition

  53. Retainer (2) - Install [3x]
  54. Evaporative Emission Canister Purge Tube (1) - Connect
  55. GM5504092

    Evaporative Emission Pipe (2) - Connect

  56. Fuel Feed Pipe (1) - Connect
  57. GM5456829
    NOTE:

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

    Intake Manifold Cover Insulator (1) - Install

  58. GM5456746

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

  59. GM5432174

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

  60. GM5432171

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

  61. Intake Manifold Cover Bolt (1) - Install and tighten [2x] - Fastener Specifications
  62. Install the oil fill cap.
  63. GM5517311

    Oil Level Indicator Tube (1) - Install

  64. GM5517312
    CAUTION:

    Refer to Fastener Caution .

    Oil Level Indicator Tube Bracket Bolt (1) - Install and tighten - Fastener Specifications

  65. GM5517313

    Oil Level Indicator (1) - Install

  66. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection
  67. Fill the cooling system. Refer to Cooling System Draining and Filling (L3B Static Fill) , or Cooling System Draining and Filling (L3B GE 47716)
  68. Pressurize the fuel system and inspect for leaks.
    1. Turn ON the ignition with the engine OFF for 2 seconds.
    2. Turn OFF the ignition for 10 seconds.
    3. Turn ON the ignition with the engine OFF.
    4. Inspect for fuel leaks.
  69. Perform the intake system learned values reset. Intake System Learned Values Reset 
  70. Perform the throttle body idle air flow compensation reset. Throttle Body Idle Air Flow Compensation Reset
scientia non olet · About LEMON Manuals