Section 2 (Engine Intake System (Induction) And Turbocharger (WRX-STI)): Turbocharger: Installation

WARNING: This page is about a different variant/trim than selected.

Install the turbocharger stay.
Tightening torque:

T1: 33 N.m (3.4 kgf-m, 24.3 ft-lb)

T2: 42.5 N.m (4.3 kgf-m, 31.3 ft-lb)

Fig 1: Identifying Turbocharger Stay Bolts With Torque Specification
Courtesy of SUBARU OF AMERICA, INC.
Connect the oil outlet hose to the oil outlet pipe.

Fig 2: Locating Oil Outlet Hose Clip
Courtesy of SUBARU OF AMERICA, INC.
Connect the engine coolant hose to the lower side of the water pipe.

Fig 3: Locating Engine Coolant Hose
Courtesy of SUBARU OF AMERICA, INC.
Temporarily tighten the union bolts and flare nuts which secure the oil inlet pipe to the turbocharger.
NOTE: Use a new gasket.

Fig 4: Locating Turbocharger Bolts
Courtesy of SUBARU OF AMERICA, INC.
Tighten the union bolts and flare nuts which secure the oil inlet pipe to the turbocharger.
CAUTION: In order to prevent damaging the oil pipe on the cylinder head side, fix the section (a) shown in the figure when tightening the oil inlet pipe flare nut, and avoid the part from rotating together while tightening the nut.

Fig 5: Identifying Oil Inlet Pipe Flare Nut
Courtesy of SUBARU OF AMERICA, INC.

Tightening torque:

T1: 16 N.m (1.6 kgf-m, 11.8 ft-lb)

T2: 20 N.m (2.0 kgf-m, 14.8 ft-lb)

Fig 6: Locating Turbocharger Bolts
Courtesy of SUBARU OF AMERICA, INC.
Connect the air control hose (A), and install the intake duct to the turbocharger.
Tightening torque:

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

Fig 7: Locating Air Control Hose
Courtesy of SUBARU OF AMERICA, INC.
Connect the engine coolant hoses to the upper side of the water pipe.

Fig 8: Locating Engine Coolant Hose Bolts
Courtesy of SUBARU OF AMERICA, INC.
Install the joint pipe to turbocharger.
NOTE: Use a new gasket.

Tightening torque:

42.5 N.m (4.3 kgf-m, 31.3 ft-lb)

Fig 9: Locating Turbocharger Joint Pipe Bolts
Courtesy of SUBARU OF AMERICA, INC.
Lift up the vehicle.
Install the center exhaust pipe. < Ref. to INSTALLATION , Center Exhaust Pipe. >
Lower the vehicle.
Install the intercooler stay RH No. 2.
Tightening torque:

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

Fig 10: Locating Center Exhaust Pipe Bolts
Courtesy of SUBARU OF AMERICA, INC.
Install the intercooler. < Ref. to INSTALLATION , Intercooler. >
Connect the battery ground terminal.
Fill engine coolant. < Ref. to FILLING OF ENGINE COOLANT , REPLACEMENT, Engine Coolant. >