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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 56 (Engine Controls And Fuel - 3.6L (LF4 LGX) - 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 2016 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Fuel Injection Fuel Rail Assembly-Install 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. Fuel Injection Fuel Rail Fastener-Install and tighten 25 N.m (18 lb ft)
  5. Install the NEW fuel feed intermediate pipe. Fuel Feed Intermediate Pipe Replacement (LGX) 
    6. Fig 2: Electrical Connector
    GM4092137Courtesy of GENERAL MOTORS COMPANY
  6. Electrical Connector -Connect
  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. Fuel Injection Fuel Rail Noise Shield Replacement -Install
  9. Fuel Pipe Shield Replacement (LGX) -Install
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