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Fuel Rails & Injectors: Installation

Install NEW "O" rings on injectors and lubricate with clean engine oil. Install injectors to fuel rail. Align protrusion on fuel injector with protrusion on fuel rail. See Fig 1. Install NEW injector retaining clip. Install fuel rail. Tighten fuel rail bolts (in 2 steps) to specification. See TORQUE SPECIFICATIONS . To complete installation, reverse removal procedure.

Fig 1: Installing Fuel Injector (Sentra, I35, Maxima, Pathfinder & QX4)
G00010154Courtesy of NISSAN MOTOR CO., U.S.A.


  1. To install, clean injector exterior. Install NEW "O" rings on injectors and lubricate with clean engine oil. Install injector into fuel rail. Install fuel injector retaining clips, always use NEW clips.
  2. Install fuel rail assembly. Tighten fuel rail bolts (in 2 steps) to specification. See TORQUE SPECIFICATIONS . To complete installation, reverse removal procedure. Pressurize fuel system and check for fuel leaks.
Fig 1: Removing & Installing Intake Manifold Collector Fasteners
G00154023Courtesy of NISSAN MOTOR CO., U.S.A.


Install NEW "O" rings on injectors and lubricate with clean engine oil. Install injectors and injector retainers. See Figure. Tighten injector retainer bolts to specification. Install fuel rail and tighten fuel rail bolts from front to rear (in 2 steps) to specification. See TORQUE SPECIFICATIONS . To complete installation, reverse removal procedure. Pressurize fuel system and check for leaks.



Install NEW "O" rings on injectors and lubricate with clean engine oil. Install injectors to fuel rail. Align protrusion on fuel injector with protrusion on fuel rail. See Figure. Install NEW injector retaining clip. Install fuel rail. Tighten fuel rail bolts (in 2 steps) to specification. Using NEW gaskets, install intake manifold collector and tighten bolts to specification. See TORQUE SPECIFICATIONS . When tightening intake manifold collector bolts, tighten 2 middle bolts first, and then 2 end bolts. To complete installation, reverse removal procedure. Start engine and check for leaks.



Install NEW "O" rings on injectors and lubricate with clean engine oil. Install injectors to fuel rail. Align protrusion on fuel injector with protrusion on fuel rail. See Figure. Install NEW injector retaining clip. Install fuel rail. Tighten fuel rail bolts (in 2 steps) to specification. Using NEW gaskets, install intake manifold collector and tighten bolts to specification. See TORQUE SPECIFICATIONS . When tightening intake manifold collector bolts, tighten in numerical order, see Fig 3. To complete installation, reverse removal procedure. Start 2engine and check for leaks.

Fig 1: Removing & Installing Intake Manifold Collector (Pathfinder & QX4)
G00154025Courtesy of NISSAN MOTOR CO., U.S.A.
Fig 2: Removing & Installing Fuel Rail & Fuel Injectors
G00154026Courtesy of NISSAN MOTOR CO., U.S.A.
Fig 3: Intake Manifold Collector Torque Pattern
G00154028Courtesy of NISSAN MOTOR CO., U.S.A.
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