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Home >> Subaru >> 2018 >> WRX STI >> Repair and Diagnosis >> Engine Mechanical >> Engine Lubrication System (STI) >> Oil Pump >> Assembly

Oil Pump: Assembly

  1. Using the ST, install the front oil seal.

    ST 499587100

    OIL SEAL INSTALLER

    NOTE: Use a new front oil seal.
    G04997893
  2. Apply a coat of engine oil to the inner rotor and outer rotor.
  3. Install the inner rotor and outer rotor.
  4. Assemble the oil relief valve and install relief valve spring and plug.
    NOTE: Use a new gasket.
  5. Install the oil pump cover.

    Tightening torque:

    T1: 5.4 N.m (0.6 kgf-m, 4.0 ft-lb)

    T2: 44 N.m (4.5 kgf-m, 32.5 ft-lb)

    G12438088
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