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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 >> High Pressure Fuel Pump And Fuel Hose >> Removal and Installation >> Removal

Removal and Installation: Removal

WARNING:
  • Be sure to read Precaution for Handling High-pressure Fuel System , when working on the high pressure fuel system.
  • Put a "CAUTION: FLAMMABLE" sign in the workshop.
  • Be sure to work in a well ventilated area and furnish workshop with a CO 2 fire extinguisher.
  • Never smoke while servicing fuel system. Keep open flames and sparks away from the work area.
  • To avoid the danger of being scalded, never drain engine coolant when engine is hot.
  1. Release fuel pressure. Refer to Work Procedure .
  2. Remove intake manifold. Refer to Exploded View .
  3. Disconnect harness connector from high pressure fuel pump.
  4. Remove acoustic absorbent. Refer to Exploded View .
  5. Remove fuel feed tube (pump side) (1) and fuel feed hose (2) from high pressure fuel pump. Refer to Exploded View .
    GNSJPBIA3741Z-741Courtesy of NISSAN NORTH AMERICA, INC.
  6. Remove high pressure fuel pump and lifter.
    CAUTION: After removing lifter, replace lifter with a new one.
  7. Remove fuel hose protector.
  8. Remove quick connector cap from quick connector (A).
    GNSJSBIA5886Z-886Courtesy of NISSAN NORTH AMERICA, INC.
  9. Remove fuel hose assembly from fuel hose clamp.
  10. Disconnect quick connector with the following procedure.
    1. Quick connector (1) can be disconnected when the tabs (F) are completely depressed. Never twist it more than necessary.
      GNSJPBIA0130Z-130Courtesy of NISSAN NORTH AMERICA, INC.

      B

      : Connection (Cross-section)

      C

      : Fuel hose

      D

      : To under floor fuel line

      E

      : To fuel tank

      G

      : Disconnection
    2. If quick connector and fuel tube on sender unit are stuck, push and pull several times until they move, and pull out.
      CAUTION:
      • Keep resin tube away from heat. Be especially careful when welding near the resin tube.
      • Keep parts away from heat source. Especially, be careful when welding is performed around them.
      • Never bend or twist resin tube during installation and disconnection.
      • Prevent acid liquid such as battery electrolyte, etc. from getting on resin tube.
      • Never remove the remaining retainer (2) on hard tube (or the equivalent) (A) except when resin tube or retainer is replaced.
      • When resin tube or hard tube (or the equivalent) is replaced, also replace retainer with new one.

        Retainer color

        : Green
      • To keep the connecting portion clean and to avoid damage and foreign materials, cover them completely with plastic bags, etc. (A) or a similar item.
        GNSJPBIA0035Z-035Courtesy of NISSAN NORTH AMERICA, INC.
  11. Remove low fuel pressure sensor.
    CAUTION:
    • Never allow water and foreign materials enter into the connector.
    • Never reuse the dropped sensor.
    • Carefully handle sensor avoiding shocks.
    • Use hex head support installation for removal and installation of sensor.
    • The contact surface of gasket must not have any stain or scoring by dust etc.
  12. Remove fuel feed hose.
  13. Remove harness clip and bracket mounting bolt.
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