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Home >> Subaru >> 2018 >> Impreza Base, 4D Sedan, Standard Trans >> Repair and Diagnosis >> Engine Mechanical >> Engine Control/Fuel System >> Fuel Injector >> Installation >> Fuel Injector RH

Fuel Injector RH

  1. Replace the following parts with new ones. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO)>Fuel Injector>REPLACEMENT .
    • Fuel injector seal
    • Slider washer
    • Backup
    • ring
    • O-ring seal
    • Stopper ring
  2. Install the fuel injector holder to the fuel injector assembly.
    Fig 1: Locating Fuel Injector Holder
    G11252816Courtesy of SUBARU OF AMERICA, INC.
  3. Align the protrusion of the fuel injector holder to the anti-rotation slot of the fuel injector pipe RH, and install the fuel injector to the fuel injector pipe RH.
    CAUTION:
    • Degrease inside of the fuel injector insertion hole of the fuel injector pipe.
    • Check the inside of the fuel injector insertion hole of the fuel injector pipe for foreign materials or damage.
    • Be careful not to allow gasoline to contact with the fuel injector seal and the inside of the mounting hole.
    • Apply liquid paraffin to the O-ring seal and install it.
    • In order to prevent damaging the O-ring seal, do not install the fuel injector to the fuel injector pipe by tilting or twisting it.
    • Make sure there is no gap between the fuel injector pipe and the fuel injector holder.
    Fig 2: Locating Fuel Injector Holder Protrusion Portion, Anti Rotation Slot And Gap
    G11252818Courtesy of SUBARU OF AMERICA, INC.
  4. Insert the fuel injector pipe RH and fuel injector as a single unit into the cylinder head, and align their positions. Then, evenly press the sections (A) and (B).
    CAUTION:
    • When installing, apply liquid paraffin to the fuel injector seal.
    • In order to prevent damaging the O-ring seal, do not install the fuel injector pipe and fuel injector by tilting them toward the cylinder head.
    Fig 3: Installing The Fuel Injector Pipe RH And Fuel Injector
    G00570348Courtesy of SUBARU OF AMERICA, INC.
  5. Tighten the bolts which hold the fuel injector pipe RH.

    Tightening torque: 

    19 N.m (1.9 kgf-m, 14.0 ft-lb)

  6. Connect connector (B) to the fuel injector, and connect connector (A) to the fuel pressure sensor.
    Fig 4: Locating Fuel Injector And Fuel Pressure Sensor Connectors
    G11252811Courtesy of SUBARU OF AMERICA, INC.
  7. Install the high-pressure fuel delivery pipe assembly. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO)>High Pressure Fuel Delivery Pipe>INSTALLATION>HIGH-PRESSURE FUEL DELIVERY PIPE ASSEMBLY .
  8. Install the air intake boot. Ref. to AIR INTAKE BOOT
  9. Connect the battery ground terminal. Ref. to REPAIR CONTENTS>NOTE>BATTERY .