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Home >> Subaru >> 2018 >> WRX STI >> Repair and Diagnosis >> Engine Mechanical >> Blowers, Superchargers & Turbochargers >> Engine Intake System (Induction) And Turbocharger (STI) >> Intercooler >> Installation

Engine Intake System (Induction) And Turbocharger (STI): Intercooler: Installation

  1. Install the intercooler stay RH No. 1, and install the clip (A) which secures the engine harness to the intercooler stay RH No. 1.

    Tightening Torque:

    16 N.m (1.6 kgf-m, 11.8 ft-lb)

    G10265143
  2. Attach the air duct hose to the throttle body.

    Tightening Torque:

    3 N.m (0.3 kgf-m, 2.2 ft-lb)

    G08539078
  3. Set the intercooler to the vehicle, and install the bolts securing the intercooler to the intercooler stay RH No. 1.

    Tightening Torque:

    16 N.m (1.6 kgf-m, 11.8 ft-lb)

    G10265139
  4. Temporarily tighten the bolt securing the intercooler stay LH to the intake manifold.
    G10265141
  5. Install the bolts which secure the intercooler to the intercooler stay LH, and install the brake booster vacuum hose to the clip (A).

    Tightening Torque:

    16 N.m (1.6 kgf-m, 11.8 ft-lb)

    G10265140
  6. Tighten the bolt securing the intercooler stay LH to the intake manifold.

    Tightening Torque:

    16 N.m (1.6 kgf-m, 11.8 ft-lb)

    G10265149
  7. Tighten the clamp (A) which secures the intake duct to the turbocharger.
  8. Tighten the clamp (B) which secures the air duct hose to the intercooler.
  9. Install the bolts (C) which secures the air by-pass valve to the intercooler, and install the air by-pass valve.
    NOTE: Use a new gasket.

    Tightening Torque:

    T1: 3 N.m (0.3 kgf-m, 2.2 ft-lb)

    T2: 16 N.m (1.6 kgf-m, 11.8 ft-lb)

    G11571883
  10. Connect the PCV hose (B) to PCV pipe assembly.
    NOTE: Make sure that the leak diagnosis connector is connected securely.
  11. Connect the connector (A) to the PCV pipe assembly.
    G11571870
  12. Connect the PCV hoses (A) and (B) to the PCV pipe assembly.
    NOTE: Make sure that the leak diagnosis connector is connected securely.
    G11571885
  13. Connect the battery ground terminal.