2020 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE

Pipe Assembly: Installation

CAUTION: Install the under cover - front so that the front end of the under cover (b) comes inside the bumper face - front (a).
G10269429Courtesy of SUBARU OF AMERICA, INC.
  1. Temporarily tighten the hose bracket bolt.
    G13648464Courtesy of SUBARU OF AMERICA, INC.
  2. Install the plastic clip to the pressure hose and suction hose.
    CAUTION: Align the installation position of the plastic clip with the protector edge of the suction hose.
    G13648465Courtesy of SUBARU OF AMERICA, INC.
  3. Connect the suction hose and return hose to the reservoir tank.
    CAUTION: Firmly insert the plastic clip of return hose to the bracket.
    G13648466Courtesy of SUBARU OF AMERICA, INC.
  4. Tighten the hose bracket bolt.

    Tightening torque: 

    18 N.m (1.8 kgf-m, 13.3 ft-lb)

  5. Connect the suction hose and pressure hose to the oil pump. Tighten the eyebolt of pressure hose.

    Tightening torque: 

    40 N.m (4.1 kgf-m, 29.5 ft-lb)

    G13648467Courtesy of SUBARU OF AMERICA, INC.
  6. Temporarily connect the pressure hose to feed pipe and return hose to return pipe. Temporarily tighten the bolt of clamp E.
    G13648468Courtesy of SUBARU OF AMERICA, INC.
    NOTE: Make sure that the character "8" on each clamp is positioned on the opposite side, as shown in the figure.
    G13648469Courtesy of SUBARU OF AMERICA, INC.
  7. Tighten clamp E.

    Tightening torque: 

    7.5 N.m (0.8 kgf-m, 5.5 ft-lb)

  8. Tighten the pressure hose to feed pipe and return hose to return pipe.

    Tightening torque: 

    15 N.m (1.5 kgf-m, 11.1 ft-lb)

  9. Connect pipes A and B to the four pipe joints of the gearbox.

    Tightening torque: 

    Cylinder side: 27 N.m (2.8 kgf-m, 19.9 ft-lb)

    Gear housing side: 17 N.m (1.7 kgf-m, 12.5 ft-lb)

    G13648470Courtesy of SUBARU OF AMERICA, INC.
  10. Install the front crossmember support plate and jack-up plate.
  11. Install the under cover. Refer to EXTERIOR/INTERIOR TRIM>FRONT UNDER COVER>INSTALLATION .
  12. Lower the vehicle.
  13. Tighten the bolts which hold the hose bracket.

    Tightening torque: 

    10 N.m (1 kgf-m, 7.4 ft-lb)

    G13648471Courtesy of SUBARU OF AMERICA, INC.
  14. Install the air intake duct. Refer to INTAKE (INDUCTION) (STI)>AIR INTAKE DUCT>INSTALLATION .
  15. Connect the battery ground terminal.
  16. Fill with the specified fluid.
    CAUTION: Never start the engine before filling with fluid; otherwise the vane pump may become seized.
  17. Finally, check the clearance between pipes or hoses as shown in the figure indicated in "General Diagnostic Table". Refer to POWER ASSISTED SYSTEM (POWER STEERING)>GENERAL DIAGNOSTIC TABLE>INSPECTION>CLEARANCE CHECK (HYDRAULIC TYPE) .
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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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