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Home >> GMC >> 2018 >> Terrain Denali, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Mechanical - 1.5L (LYX)) >> Repair Instructions - Off Vehicle >> Fuel Rail And Injectors Installation >> Fuel Rail Assembly Installation Procedure

Fuel Rail Assembly Installation Procedure

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Plate And Bolts
    GM3709772Courtesy of GENERAL MOTORS COMPANY
  1. If any components of EN-51146  remover are installed to the fuel rail, perform the following procedure:
      NOTE:

      If the plate is not installed on the supports, it is likely one or more fuel injectors have been replaced. Disregard the following steps for fuel injectors that have already been replaced.

    1. Remove the bolts (1) and EN-51146-100  plate (2).
    2. Clean the fuel injector screws of any residual threadlock agent.
    3. Remove only the front EN-51146-1-6  demounting screw and EN-51146-1-1  support (3) for the first fuel injector.
    4. Apply one drop of threadlock agent onto the screw (4). Refer to Adhesives, Fluids, Lubricants, and Sealers .
      5. CAUTION:

      Refer to Fastener Caution .

    5. Install the fuel injector screw (4) and tighten to 5 N.m (44 lb in).
    6. Remove the rear EN-51146-1-6  demounting screw and EN-51146-1-1  support (6) for the first fuel injector.
    7. Apply one drop of threadlock agent onto the screw (5). Refer to Adhesives, Fluids, Lubricants, and Sealers .
    8. Install the fuel injector screw (5) and tighten to 5 N.m (44 lb in).
    9. Repeat the same procedure for the remaining fuel injectors with EN-51146-1-6  demounting screw and EN-51146-1-1  supports still attached.
    10. Connect the fuel injector wiring harness plugs, if necessary.
  2. Ensure the fuel rail assembly and fuel injector bores have been cleaned prior to installation.
    3. Fig 2: Fuel Rail Assembly
    GM3656897Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    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.

  3. Carefully install the fuel rail assembly (1).
  4. Push the fuel injectors slightly in their seats.
    5. Fig 3: Fuel Rail Bolt Tightening Sequence
    GM3656901Courtesy of GENERAL MOTORS COMPANY
  5. Tighten the 4 lower fuel rail bolts in increments of 1 turn until they are seated.
  6. Tighten the 4 lower fuel rail bolts in sequence to 10 N.m (89 lb in).
  7. Tighten the 4 upper fuel rail bolts in sequence to 10 N.m (89 lb in).
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