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Home >> Cadillac >> 2005 >> DeVille Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Introduction >> Repair Instructions >> Fuel Rail Assembly Replacement >> Installation Procedure
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Installation Procedure

    NOTE:
    • Use care when servicing the fuel system components, especially the fuel injector electrical connectors, the fuel injector tips, and the injector O-rings. Plug the inlet and the outlet ports of the fuel rail in order to prevent contamination.
    • Do not use compressed air to clean the fuel rail assembly as this may damage the fuel rail components.
    • Do not immerse the fuel rail assembly in a solvent bath in order to prevent damage to the fuel rail assembly.
    Fig 1: View Of Fuel Rail
    GM576198Courtesy of GENERAL MOTORS CORP.
  1. Lubricate the new lower injector O-ring seals with clean engine oil.
  2. If replacing the fuel rail, install the fuel injectors. Refer to Fuel Injector Replacement .
  3. Install the new O-ring seals on the spray tip end of each injector.
  4. Install the fuel rail (1).
    5. NOTE: Refer to Fastener Notice in Cautions and Notices.
  5. Install the fuel rail attaching studs (2).

    Tighten:  Tighten the studs to 10 N.m (89 lb. in.).

    6. Fig 2: View Of Fuel Injector & Electrical Connectors
    GM490817Courtesy of GENERAL MOTORS CORP.
  6. Connect the fuel injector electrical connectors (1) to each fuel injector (2).
    7. Fig 3: View Of Fuel Rail Bracket Retainer Nut
    GM522654Courtesy of GENERAL MOTORS CORP.
  7. Install the fuel rail bracket retainer nut.

    Tighten:  Tighten the nut to 10 N.m (89 lb. in.).

    8. Fig 4: Identifying PCV Valve
    GM490597Courtesy of GENERAL MOTORS CORP.
  8. Install the positive crankcase ventilation (PCV) valve (1) to the cam cover.
  9. Install the coolant surge tank inlet pipe. Refer to Surge Tank Hose/Pipe Replacement - Inlet in Engine Cooling.
    10. Fig 5: View Of PCV Valve Fresh Air Tube
    GM522644Courtesy of GENERAL MOTORS CORP.
  10. Install the PCV air tube to the cam cover.
    11. Fig 6: View Of Fuel Pressure Regulator Vacuum Tube
    GM522641Courtesy of GENERAL MOTORS CORP.
  11. Connect the fuel pressure regulator vacuum hose.
    12. Fig 7: Fuel Lines Component View
    GM575657Courtesy of GENERAL MOTORS CORP.
  12. Connect the fuel feed and return pipes (2, 3) to the fuel rail. Refer to Quick Connect Fitting(s) Service (Metal Collar) .
  13. Connect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
  14. Inspect for fuel leaks using the following procedures:
    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.
  15. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical.
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