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Home >> Isuzu >> 2004 >> Ascender LS, 5.3 P, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls (Introduction) - 5.3L >> Repair Instructions >> Fuel Rail Outlet Pipe Replacement >> Installation Procedure

Installation Procedure

    Fig 1: Exploded View Of Fuel Rails & Injector Components
    GM350543Courtesy of GENERAL MOTORS CORP.
  1. Lubricate a NEW fuel return pipe O-ring (6) with clean engine oil.
  2. Install the fuel return pipe O-ring (6) onto the fuel return pipe (1).
  3. Install the fuel return pipe (1).
  4. Install the fuel return pipe retainer (2) and the fuel return pipe attaching screw (3).
    NOTE: Refer to the Fastener Notice in Cautions and Notices.
  5. Install the retaining clip attaching screw (4).

    Tighten: 

    1. Tighten the crossover fuel pipe retainer clip attaching screws (4) to 3.8 N.m (34 lb in).
    2. Tighten the fuel return pipe attaching screw (3) to 5 N.m (44 lb in).

    6. Fig 2: View Of Rear Of Engine Fuel Pipe Connections
    GM300360Courtesy of GENERAL MOTORS CORP.
  6. Connect the fuel return pipe (1) to the fuel rail. Refer to Quick Connect Fitting(s) Service (Metal Collar) .
  7. Install the fuel fill cap.
  8. Connect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
  9. Use the following procedure in order to inspect for leaks:
    1. Turn the ignition ON, with the engine OFF, for 2 seconds.
    2. Turn the ignition OFF for 10 seconds.
    3. Turn the ignition ON, with the engine OFF.
    4. Inspect for fuel leaks.
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