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Home >> Infiniti >> 2018 >> Q70 5.6 Luxe, RWD >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical (5.6L) (Except Hybrid) >> Removal And Installation >> Fuel Injector And Fuel Tube >> Removal and Installation >> Installation

Removal and Installation: Installation

CAUTION: Do not reuse O-rings.
  1. After removing fuel pressure sensor, install fuel pressure sensor according to the instructions below:
    1. Fix fuel rail in a vice.
      CAUTION: Never scratch or crack fuel rail during work procedure.
    2. Apply engine oil to the entire perimeter of the fuel pressure sensor screw.
      CAUTION: Check that fuel rail and fuel pressure sensor screw have no damage, foreign matter, or stains.
    3. Install gasket to fuel pressure sensor.
    4. Tighten fuel pressure sensor.

      SYMBOL

      : 10.0 N.m (1.0 kg-m, 89 in-lb)
      CAUTION:
      • Before tightening fuel pressure sensor, securely install a hexagon tool.
      • Never use impact applied fuel pressure sensor or gasket, such as dropped.
    5. Tighten fuel rail pressure sensor again by using angle wrench [SST: KV10112100] and torque wrench. (Angle tightening)

      SYMBOL

      : 80 deg. [(-0 deg.) - (+5 deg.)]
      CAUTION:
      • To check tightening angle, use angle wrench [SST: KV10112100]. Never judge the angle by visual inspection.
      • The torque value for the angle tightening must be 90 N.m (9.2 kg-m, 66 ft-lb) or less.
      • If torque value reaches 90 N.m (9.2 kg-m, 66 ft-lb), then replace fuel rail pressure sensor with a new one.
  2. Install seal ring to fuel injector as per the following:
    CAUTION:
    • Handle seal ring with bare hands. Never wear gloves.
    • Never apply engine oil to seal ring.
    • Never clean seal ring with solvent.
    1. Install seal guide [SST: KV10119720 (--)] (A) to fuel injector (1).
      GNSJSBIA0347Z-347Courtesy of NISSAN NORTH AMERICA, INC.
    2. Set seal ring (1) to seal installer [SST: KV10119730 (--)] (A).
      GNSJSBIA0348Z-348Courtesy of NISSAN NORTH AMERICA, INC.
    3. Straightly insert seal ring (1), which is set in precedent step, to fuel injector as shown in the figure below and install.
      GNSJSBIA0350Z-350Courtesy of NISSAN NORTH AMERICA, INC.
      CAUTION: Be careful that seal ring does not exceed the groove portion of fuel injector.
    4. Insert drift [SST: KV10119710 (--)] (A) to injector and rotate clockwise and counterclockwise by 90 deg. while pressing seal ring to fit it.
      GNSJPBIA5630Z-630Courtesy of NISSAN NORTH AMERICA, INC.

      B

      : Chamfering

      SYMBOL

      : Injector side
      CAUTION: Be careful to a direction of the tool.
      NOTE: Compress seal ring, because this operation is for rectifying stretch of seal ring caused by installation and for preventing sticking when inserting injector into cylinder head.
  3. Install O-ring and back up ring to fuel injector. When handing new O-ring and back up ring, paying attention to the following caution items:
    CAUTION:
    • Do not reuse O-ring.
    • Handle O-ring with bare hands. Never wear gloves.
    • Lubricate O-ring with new engine oil.
    • Never clean O-ring with solvent.
    • Check that O-ring and its mating part are free of foreign material.
    • When installing O-ring, be careful not to scratch it with tool or fingernails. Also be careful not to twist or stretch O-ring. If O-ring was stretched while it was being attached, never insert it quickly into fuel rail.
    • Insert new O-ring straight into fuel rail. Never decenter or twist it.
    • Always install the back up ring (1) in the right direction as instructed.
      GNSJPBIA3864Z-864Courtesy of NISSAN NORTH AMERICA, INC.
  4. Install fuel injector (1) to fuel rail (2) as per the following:
    GNSJSBIA0352Z-352Courtesy of NISSAN NORTH AMERICA, INC.

    3

    : O-ring (blue)

    4

    : Back up ring
    1. Install fuel injector holder (5) to fuel injector.
      CAUTION:
      • Never reuse holder. Replace it with a new one.
      • Be careful to keep fuel injector holder from interfering with O-ring. If interference occurs, replace O-ring.
    2. Insert fuel injector into fuel rail with fuel injector holder attached.
      • Insert it while matching it to the axial center.
      • Insert so that protrusion (A) of fuel injector is aligned to cutout (B).
    3. Check that installation is complete by checking that fuel injector does not rotate or come off.
      • Check that protrusions of fuel injectors and fuel rail are aligned with cutouts of clips after installation.
  5. Insert insulator into mounting hole of fuel injector of cylinder head.
  6. Install fuel rail and fuel injector assembly to cylinder head.
    • Tighten mounting bolts and nuts in two steps in numerical order as shown in the figure, below.
      Fig 1: Fuel Rail And Fuel Injector Assembly Bolt Tightening Sequence
      GNSJSBIA0353Z-353Courtesy of NISSAN NORTH AMERICA, INC.

      SYMBOL

      : Engine front

      1st step

      SYMBOL : 10.0 N.m (1.0 kg-m, 89 in-lb)

      2nd step

      SYMBOL : 20.5 N.m (2.1 kg-m, 15 ft-lb)
  7. Connect injector harness connector.
  8. Install fuel feed tube (bank side) to fuel rail.
    CAUTION:
    • Never reuse fuel feed tube (bank side).
    • When installing fuel feed tube (bank side) to fuel rail, press the flange part to install the tube.
    • Handle O-ring with bare hands. Never wear gloves.
    • Lubricate O-ring with new engine oil.
      GNSJPBIA3924Z-924Courtesy of NISSAN NORTH AMERICA, INC.
    • Never clean O-ring with solvent.
    • Check that O-ring and its mating part are free of foreign material.
    • Never scratch O-ring with tools or fingernails when installing fuel feed tube (bank side).
    • Insert new fuel feed tube (bank side) straight into fuel rail. Never decenter or twist the fuel feed tube (bank side) during insertion.
    • Tighten mounting bolts in numerical order as shown in the figure, below.
      Fig 2: Fuel Feed Tube (Bank Side) Bolt Tightening Sequence
      GNSJSBIA0355Z-355Courtesy of NISSAN NORTH AMERICA, INC.

      SYMBOL

      : Engine front
  9. Install fuel feed tube (pump side) (1) to fuel feed tube (bank side) (2) as per the following:
    GNSJSBIA2224Z-224Courtesy of NISSAN NORTH AMERICA, INC.

    SYMBOL

    : Engine front
    CAUTION:
    • When removing fuel feed tube (pump side), always replace fuel feed tube (bank side) together with fuel feed tube (pump side).
    • Never reuse fuel feed tube (pump side).
    • Never use fuel feed tube (pump side) if its terminal tip is damaged.
    • Observe the tightening order and the tightening torque.
    1. Apply engine oil to flare screw parts of high pressure pump and tube between banks.
    2. Manually tighten 2 flare nuts without using a tool until they are seated to screw thread.
      CAUTION: When temporarily tightening flare nut, place pipe in the center of the nut inner diameter.
    3. Tighten mounting bolt (A).
      GNSJSBIA0356Z-356Courtesy of NISSAN NORTH AMERICA, INC.

      B

      : To high pressure fuel pump

      SYMBOL

      : Engine front
    4. Tighten flare nuts in numerical order as shown in the figure, above.
      CAUTION: Always fit the tool completely with the nut.
  10. Install in the reverse order of removal after this step.
    CAUTION: After checking fuel leakage, maintain ten minutes of idling to bleed the fuel line.
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