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Home >> Dodge and Ram >> 1999 >> Durango 5.9 Z, 4WD, Part Time >> Repair and Diagnosis >> Engine Performance >> Remove, Overhaul & Install >> Engine Controls - Component Remove/Install/Overhaul - RWD - Gasoline >> Fuel System >> Fuel Rail & Injectors >> Installation
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Fuel Rail & Injectors: Installation

  1. If installing injector on fuel rail, install NEW "O" ring on injector. Coat "O" ring on injector with engine oil. Install injector on fuel rail. Install retaining clip on injector and fuel rail.
  2. To install remaining components, reverse removal procedure using NEW "O" ring at bottom of each injector. Coat "O" ring on injector with engine oil before installing injectors and fuel rail.
  3. Tighten fuel rail bolts to specification. See TORQUE SPECIFICATIONS . Install fuel line on fuel rail using proper procedure. See FUEL LINE AT FUEL RAIL . Start engine and check for leaks.


  1. If installing injector on fuel rail, install NEW "O" ring on injector. Coat "O" ring on injector with engine oil. Install injector on fuel rail. Install retaining clip on injector and fuel rail.
  2. To install remaining components, reverse removal procedure using NEW "O" ring at bottom of each injector. Coat "O" ring on injector with engine oil before installing injectors and fuel rails.
  3. Push passenger's side fuel rail and then driver's side fuel rail downward until shoulder on each injector contacts the intake manifold. Ensure all injectors are fully seated.
  4. Tighten fuel rail bolts and throttle body bolts to specification. See TORQUE SPECIFICATIONS . Install fuel line on fuel rail using proper procedure. See FUEL LINE AT FUEL RAIL  under FUEL SYSTEM. Start engine and check for leaks.


  1. If installing injector on fuel rail, install NEW "O" ring on injector. Coat "O" ring on injector with engine oil. Install injector on fuel rail. Position injectors on fuel rails so electrical connector on injector is facing toward passenger's side of the vehicle. Install retaining clip on injector and fuel rail.
  2. To install remaining components, reverse removal procedure using NEW "O" ring at bottom of each injector. Coat "O" ring on injector with engine oil before installing injectors and fuel rails.
  3. Push passenger's side fuel rail and then driver's side fuel rail downward until shoulder on each injector contacts the intake manifold. Ensure all injectors are fully seated.
  4. Tighten fuel rail bolts to specification. See TORQUE SPECIFICATIONS . Using NEW gasket, install upper intake manifold with all bolts loosely installed. Tighten upper intake manifold bolts to specification in sequence. See Fig 1. See TORQUE SPECIFICATIONS .
  5. Tighten throttle body nuts to specification. See TORQUE SPECIFICATIONS . Install fuel line on fuel rail using proper procedure. See FUEL LINE AT FUEL RAIL . Start engine and check for leaks.
Fig 1: Upper Intake Manifold Bolt Tightening Sequence (Ram Pickup 8.0L)
G98F01380Courtesy of CHRYSLER LLC
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