LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Subaru >> 2021 >> WRX Base >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 13 (Engine Lubrication System (2.5L)) >> Oil Pump >> Installation
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Oil Pump: Installation

WARNING: This page is about a different variant/trim than selected.
  1. Using the ST, install the front oil seal.
    ST 499587100 OIL SEAL INSTALLER
    NOTE: Use a new front oil seal.
    G04997893Courtesy of SUBARU OF AMERICA, INC.
  2. Apply liquid gasket to the mating surfaces of oil pump.
    NOTE: Install within 5 min. after applying liquid gasket.

    Liquid gasket: 

    THREE BOND 1217G (Part No. K0877Y0100), THREE BOND 1217H or equivalent

    G05333114Courtesy of SUBARU OF AMERICA, INC.
  3. Apply a coat of engine oil to the inside of front oil seal.
    G04997765Courtesy of SUBARU OF AMERICA, INC.
  4. Install the oil pump to cylinder block.
    CAUTION:
    • Be careful not to damage the front oil seal during installation.
    • Make sure the front oil seal lip is not folded.
    NOTE:
    • Align the flat surface of oil pump's inner rotor with that of crankshaft before installation.
    • Use new O-rings.
    • Do not forget to install O-rings.
  5. Apply liquid gasket to the three bolts thread shown in figure. (When reusing bolts)

    Liquid gasket: 

    THREE BOND 1324 (Part No. 004403042) or equivalent

    Tightening torque: 

    6.4 N.m (0.7 kgf-m, 4.7 ft-lb)

    G07909946Courtesy of SUBARU OF AMERICA, INC.
  6. Install the crank sprocket. Refer to MECHANICAL(STI)>CRANK SPROCKET>INSTALLATION .
  7. Install the water pump. Refer to COOLING(STI)>WATER PUMP>INSTALLATION .
  8. Install the crankshaft position sensor. Refer to FUEL INJECTION (FUEL SYSTEMS) (STI)>CRANKSHAFT POSITION SENSOR>INSTALLATION .
  9. Lift up the vehicle.
  10. Install oil cooler pipe (A) and hose (C).
  11. Install the oil cooler pipe (A) to oil pump using the bolts (B).

    Tightening torque: 

    6.4 N.m (0.7 kgf-m, 4.7 ft-lb)

    G06334576Courtesy of SUBARU OF AMERICA, INC.
  12. Lower the vehicle.
  13. Install the radiator. Refer to COOLING(STI)>RADIATOR>INSTALLATION .
  14. Connect the battery ground terminal.