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Home › GMC › 2023 › Terrain SLT, FWD › Repair and Diagnosis › Engine Performance › System › Engine Controls And Fuel - 1.5L (LSD) - Repair Instructions › Repair Instructions › Fuel Injection Fuel Rail Assembly Replacement › Installation Procedure

Installation Procedure

  1. Clean ALL cylinder head bores and clean ANY fuel injectors that will be reused. Fuel Injector and Fuel Injector Bore Cleaning and Inspection
  2. GM4823862Courtesy of GENERAL MOTORS COMPANY

    ANY fuel injectors being reused MUST have NEW combustion fuel injector seals (1) installed. Fuel Rail and Injectors Installation

  3. GM4823860Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    If the EN-51146-100  Plate is NOT installed, then it is likely that one or more fuel injectors have been replaced. Disregard the following steps for any fuel injectors that have already been replaced.

  4. Use a suitable wrench (2) to hold the EN-51146-1-1  Support (3) while removing the corresponding plate screw (4).
  5. Use the previous instructions to remove ALL remaining plate screws (4).
  6. Remove the EN-51146-100  Plate (5).
  7. GM6181900Courtesy of GENERAL MOTORS COMPANY

    At the fuel injector for Cylinder 1, remove the outer EN-51146-1-6  Demounting Screw and EN-51146-1-1  Support (1).

    8. CAUTION:

    This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component.

  8. If a NEW threaded component is being installed, loosen the adhesive using a metal pick or similar tool before proceeding. If threaded component is reused, prepare the threaded component using the following steps:
    1. Remove any loose cured adhesive from the external threads of the component using a lint free cloth.
    2. Thread the cleaned component into the internal mating threads and remove to loosen trapped cured adhesive.
    3. Remove loose debris from internal and external threads using compressed air.
    4. Apply liquid thread locking adhesive in a strip along half of the length of the external threads, starting at the tip, just prior to installation. Adhesives, Fluids, Lubricants, and Sealers
    9. CAUTION:

    Refer to Fastener Caution .

  9. Install and tighten the NEW outer fuel injector bolt (2) 5 N.m (44 lb in).
  10. GM6181886Courtesy of GENERAL MOTORS COMPANY

    At the fuel injector for Cylinder 1, remove the inner EN-51146-1-6  Demounting Screw and EN-51146-1-1  Support (1).

    11. CAUTION:

    This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component.

  11. If a NEW threaded component is being installed, loosen the adhesive using a metal pick or similar tool before proceeding. If threaded component is reused, prepare the threaded component using the following steps:
    1. Remove any loose cured adhesive from the external threads of the component using a lint free cloth.
    2. Thread the cleaned component into the internal mating threads and remove to loosen trapped cured adhesive.
    3. Remove loose debris from internal and external threads using compressed air.
    4. Apply liquid thread locking adhesive in a strip along half of the length of the external threads, starting at the tip, just prior to installation. Adhesives, Fluids, Lubricants, and Sealers
      5. CAUTION:

      Refer to Fastener Caution .

    5. Install and tighten the NEW inner fuel injector bolt (2) 5 N.m (44 lb in).
  12. GM4825475Courtesy of GENERAL MOTORS COMPANY
    NOTE:
    • The alignment of the fuel injectors within the cylinder head bores is CRITICAL for fuel injection system function.
    • During installation of the fuel injectors, the injectors MUST remain positioned straight in the cylinder head bores.

    Carefully install the fuel injection fuel rail and fuel injectors as an assembly (1) into the cylinder head bores.

  13. GM4825477Courtesy of GENERAL MOTORS COMPANY

    Perform the following steps to install the 8 fuel injection fuel rail bolts (1) :

    1. Install and tighten the 8 fuel rail bolts in the sequence shown in increments of one turn each until all bolts are seated.
    2. Tighten the 4 lower and 4 upper fuel rail bolts in the sequence shown to 10 N.m (89 lb in).
  14. Fuel Feed Intermediate Pipe - Install - Fuel Feed Intermediate Pipe Replacement 
  15. Fuel Injection Fuel Rail Wiring Harness@Engine Wiring Harness - Connect
  16. Ignition Coil - Install [4x] - Ignition Coil Replacement 
  17. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection (KL9)
  18. Inspect for fuel leaks using the following procedure:
    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.
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