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Home >> Subaru >> 2018 >> WRX STI >> Repair and Diagnosis >> Engine Mechanical >> Blowers, Superchargers & Turbochargers >> Engine Intake System (Induction) And Turbocharger (STI) >> Turbocharger >> Inspection >> Waste Gate Actuator

Waste Gate Actuator

  1. Remove the intercooler. Ref. to INTAKE (INDUCTION) (STI)>Intercooler>REMOVAL .
  2. Remove the turbocharger upper cover.
    G08539115
  3. Remove the boost hose (B) from the waste gate actuator (A) of the turbocharger, and connect the Mighty Vac to the waste gate actuator (A).
    G12437657
  4. Pressurize slowly with the Mighty Vac, and measure the pressure when the control rod stroke (D) becomes 2 mm (0.08 in). If it is not within the standard, replace the turbocharger assembly.
    CAUTION: Do not pressurize over 89.9 kPa (0.92 kg/cm2 , 13.0 psi) to prevent damaging the waste gate actuator.

    Operating pressure (control rod stroke 2 mm (0.08 in)):

    Standard

    74.7 - 80.8 kPa (0.76 - 0.82 kg/cm2 , 10.8 - 11.7 psi)

  5. After inspection, install the related parts in the reverse order of removal.

    Tightening Torque:

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

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