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Home >> Infiniti >> 2004 >> QX56 RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1200 (Engine Mechanical) >> Fuel Injector And Fuel Tube >> Removal and Installation >> Installation

Removal and Installation: Installation

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  1. Install the fuel damper to each fuel tube using the following steps.
    1. Apply engine oil to the new O-ring and set it into the cap of the fuel tube.
      CAUTION:
      • Handle O-ring with bare hands. Never wear gloves.
      • Lubricate O-ring with new engine oil.
      • Do not clean O-ring with solvent.
      • Make sure that O-ring and its mating part are free of foreign material.
      • When installing O-ring, do not scratch it with tool or fingernails.
      • Do not twist or stretch the O-ring.
      Fig 1: Installing Fuel Damper To Each Fuel Tube
      G02384427Courtesy of NISSAN MOTOR CO., U.S.A.
    2. Make sure that the backup spacer is in the O-ring connecting surface of the fuel damper.
      NOTE: The backup spacer is part of the fuel damper assembly.
    3. Insert the fuel damper until it seats on the fuel tube.
      CAUTION:
      • Insert straight, making sure that the axis is lined up.
      • Do not pressure-fit with excessive force.
        1. Reference value: 130 N (13.3 kg, 29.2 lb) 
    4. Install the cap, and then tighten the bolts evenly.
      • After tightening the bolts, make sure that there is no gap between the cap and fuel tube.
  2. Install new O-rings to the fuel injector paying attention to the items below.
    CAUTION:
    • Upper and lower O-ring are different.
      1. Fuel tube side: Blue
      2. Nozzle side: Brown
    • Handle O-ring with bare hands. Never wear gloves.
    • Lubricate new O-ring with new engine oil.
    • Do not clean O-ring with solvent.
    • Make sure 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, do not insert it quickly into fuel tube.
    • Insert O-ring straight into fuel tube. Do not angle or twist it.
  3. Install the fuel injector to the fuel tube using the following steps.
    1. Insert new clip into clip mounting groove on the fuel injector.
      • Insert clip so that lug "A" of fuel injector matches notch "A" of the clip.
        CAUTION:
        • Do not reuse clip. Replace it with a new one.
        • Do not allow the clip to interfere with the O-ring. If interference occurs, replace the O-ring.
    2. Insert the fuel injector into the fuel tube with the clip attached.
      • Insert it while matching it to the axial center.
      • Insert fuel injector so that lug "B" of fuel tube matches notch "B" of the clip.
      • Make sure that the fuel tube flange is securely fixed in the flange fixing groove on the clip.
    3. Make sure that installation is complete by checking that the fuel injector does not rotate or come off.
      • Make sure that the protrusions of the fuel injectors are aligned with the cutouts of the clips after installation.
    Fig 2: Inserting Fuel Injector Into Fuel Tube With Clip Attached
    G02384428Courtesy of NISSAN MOTOR CO., U.S.A.
  4. Install the fuel tube and fuel injector assembly to the intake manifold.
    CAUTION: Do not let the tip of the injector nozzle come in contact with other parts.
    • Tighten fuel tube assembly bolts "a" to "b" in illustration in two steps.
      1. 1st step: 12.8 N.m (1.3 kg-m, 9 ft-lb) 
      2. 2nd step: 24.5 N.m (2.5 kg-m, 18 ft-lb) 
    Fig 3: Tightening Fuel Tube Assembly Bolts "A" To "B" With Specified Steps
    G02384429Courtesy of NISSAN MOTOR CO., U.S.A.
  5. Install the fuel hose assembly.
    • Insert connectors straight, making sure that the axis is lined up with fuel tube side to prevent O-ring from being damaged.
    • Tighten bolts evenly in several steps.
    • Make sure that there is no gap between the flange and fuel tube after tightening the bolts.
    CAUTION:
    • Handle O-ring with bare hands. Do not wear gloves.
    • Lubricate O-ring with new engine oil.
    • Do not clean O-ring with solvent.
    • Make sure 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, do not insert it quickly into fuel tube.
    • Insert new O-ring straight into fuel tube. Do not twist it.
  6. Installation of the remaining components is in the reverse order of removal.
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