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Home >> GMC >> 2017 >> Acadia SL >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Controls And Fuel - 2.5L (LCV) - Repair Instructions >> Repair Instructions >> Fuel Injection Fuel Rail Assembly Replacement >> Installation Procedure
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Installation Procedure

  1. Use the EN-47909  cleaning kit to clean the cylinder head bores.
  2. If necessary, replace the fuel injection fuel rail insulators. Refer to Fuel Rail and Injectors Cleaning and Inspection
    3. Fig 1: Fuel Rail
    GM2726739Courtesy of GENERAL MOTORS COMPANY
  3. Install the fuel injection fuel rail (1), making sure the fuel injectors seat into the cylinder head evenly.
    4. Fig 2: Fuel Rail Bolt Tightening Sequence
    GM2726740Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to Fastener Caution .

  4. To install the fuel injection fuel rail bolts, perform the following steps:
    1. First Pass: Start ALL bolts by hand, but do NOT tighten.
    2. Second Pass: Tighten the outer two bolts by hand to seat the fuel injectors.
    3. Third Pass: Tighten the remaining bolts by hand.
    4. Final Pass: Tighten ALL bolts in sequence to 25 N.m (18 lb ft).
  5. Connect the wiring harness to the fuel injection fuel rail harness.
  6. Install NEW Fuel Injection Fuel Rail Fuel Pressure Sensor. Refer to Fuel Injection Fuel Rail Fuel Pressure Sensor Replacement 
  7. Install NEW Fuel Feed Intermediate Pipe. Refer to Fuel Feed Intermediate Pipe Replacement 
  8. Install Fuel Injection Fuel Rail Noise Shield. Refer to Fuel Injection Fuel Rail Noise Shield Replacement 
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