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Home >> Subaru >> 2017 >> WRX STI >> Repair and Diagnosis >> Engine Mechanical >> Blowers, Superchargers & Turbochargers >> Engine Intake System (Induction) And Turbocharger (2.5L) >> Intercooler >> Installation

Engine Intake System (Induction) And Turbocharger (2.5L): Intercooler: Installation

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

    Tightening torque: 

    16 N.m (1.6 kgf-m, 11.8 ft-lb) 

    Fig 1: Locating Intercooler Stay RH Bolts
    G10265143Courtesy of SUBARU OF AMERICA, INC.
  2. Attach the air duct hose to the throttle body.

    Tightening torque: 

    3 N.m (0.3 kgf-m, 2.2 ft-lb) 

    Fig 2: Locating Air Duct Hose Of Throttle Body
    G08539078Courtesy of SUBARU OF AMERICA, INC.
  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) 

    Fig 3: Locating Intercooler Installation Bolt
    G10265139Courtesy of SUBARU OF AMERICA, INC.
  4. Temporarily tighten the bolt securing the intercooler stay LH to the intake manifold.
    Fig 4: Locating Intercooler Stay LH Bolts
    G10265141Courtesy of SUBARU OF AMERICA, INC.
  5. Install the bolts which secure the intercooler to the intercooler stay LH, and install the brake booster vacuum hose to the clip (A).
    Fig 5: Locating Brake Booster Vacuum Hose Clip
    G10265140Courtesy of SUBARU OF AMERICA, INC.

    Tightening torque: 

    16 N.m (1.6 kgf-m, 11.8 ft-lb) 

  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) 

    Fig 6: Locating Intake Manifold Bolts
    G10265149Courtesy of SUBARU OF AMERICA, INC.
  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 bypass valve to the intercooler, and install the air bypass 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) 

    Fig 7: Air Bypass Valve Bolts And Torque Specifications
    G11571883Courtesy of SUBARU OF AMERICA, INC.
  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.
    Fig 8: Locating PCV Pipe Assembly Connector
    G11571870Courtesy of SUBARU OF AMERICA, INC.
  12. Connect the PCV hoses (A) and (B) to the PCV pipe assembly.
    NOTE: Make sure that the leak diagnosis connector is connected securely.
    Fig 9: Locating PCV Hoses Connector
    G11571885Courtesy of SUBARU OF AMERICA, INC.
  13. Install the chamber assembly. <Ref. to INSTALLATION , Chamber Assembly.>