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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 166 (Engine Controls And Fuel - 3.6L (LGX LF4) - Repair Instructions) >> Repair Instructions >> Fuel Injection Fuel Rail Assembly Replacement - Bank 1 (LGX) >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install Fuel Injection Fuel Rail Assembly into the cylinder head evenly.
    2. Fig 1: Fuel Injection Fuel Rail Bolt Tightening Sequence
    GM4092399Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to Fastener Caution .

  2. Hand tighten the two outer fuel rail fasteners to seat the injectors.
  3. Start and hand tighten the remaining fuel rail fastener.
  4. Tighten the fuel rail fasteners in the sequence shown above:
    1. Install and tighten Fuel Injection Fuel Rail Fasteners (Qty: 3) to 25 N.m (18 lb ft)
  5. Install the NEW fuel feed intermediate pipe. Refer to Fuel Feed Intermediate Pipe Replacement (LGX) 
    6. Fig 2: Electrical Connector
    GM4092137Courtesy of GENERAL MOTORS COMPANY
  6. Connect Electrical Connector (1)
  7. 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.
  8. Install Fuel Injection Fuel Rail Noise Shield. Refer to Fuel Injection Fuel Rail Noise Shield Replacement .
  9. Install Fuel Pipe Shield. Refer to Fuel Pipe Shield Replacement (LGX) .
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