2016 Subaru WRX STI Series.HyperBlueFACTORY OEM SERVICE PROCEDURE

Fuel Pump: Installation

  1. Install the fuel pump assembly to the fuel tank.
    1. Make sure the sealing portion is free from fuel or foreign matter before installation.
    2. Align the protrusion (A) of the gasket to the position shown in the figure, and install the gasket from the lower side of the fuel pump assembly.
      NOTE: Use a new gasket.
    3. Align the protrusion (C) of fuel pump upper plate cushion with the protrusion (C) of the fuel pump assembly as shown in the figure, and install the fuel pump upper plate cushion from the upper side of the fuel pump assembly.
    4. Align the cutout of the fuel pump upper plate with the protrusion (C), and install the fuel pump upper plate from the upper side of the fuel pump assembly so that the protrusions (B) (3 places) of the gasket fit the holes of the fuel pump upper plate.
    5. Install the fuel pump assembly to the fuel tank in the direction shown in the figure, and tighten the nuts to the specified torque in the order as shown in the figure.
      CAUTION: Set the arm and float of the fuel level sensor while paying attention to prevent them from contacting the fuel tank. If the arm of the fuel level sensor is bent, the fuel gauge may not read correctly.

      Tightening torque: 

      4.4 N.m (0.4 kgf-m, 3.2 ft-lb) 

      Fig 1: Fuel Pump Nut Tightening Sequence
      G10289957Courtesy of SUBARU OF AMERICA, INC.
  2. Connect the quick connectors of fuel delivery tube (A), fuel return tube (B), and jet pump tube (C). < Ref. to INSTALLATION , Fuel Delivery, Return and Evaporation Lines. >
    Fig 2: Identifying Fuel Delivery, Fuel Return And Jet Pump Tubes
    G10264935Courtesy of SUBARU OF AMERICA, INC.
  3. Connect the connector to the fuel pump.
    Fig 3: Locating Fuel Pump Connector
    G10264934Courtesy of SUBARU OF AMERICA, INC.
  4. Install the service hole cover.
    Fig 4: Locating Service Hole Cover Bolts
    G10264933Courtesy of SUBARU OF AMERICA, INC.
  5. Install the rear seat cushion. < Ref. to INSTALLATION , Rear Seat. >
  6. Connect the battery ground terminal.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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