Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual - part 91

EX(STI)-12

Joint Pipe

EXHAUST

4. Joint Pipe

A: REMOVAL

CAUTION:

Vehicle  components  are  extremely  hot  after

driving. Be wary of receiving burns from heated

parts.

1) Disconnect the ground cable from battery.

2) Lift up the vehicle.

3) Remove  the  under  cover.  <Ref.  to  EI-28,  RE-

MOVAL, Front Under Cover.>

4) Remove the front oxygen (A/F) sensor. <Ref. to

FU(STI)-54, REMOVAL, Front Oxygen (A/F) Sen-

sor.>  <Ref.  to  FU(w/o  STI)-53,  REMOVAL,  Front

Oxygen (A/F) Sensor.>

5) Remove the exhaust manifold RH lower cover.

6) Remove the bolts and nuts which hold exhaust

manifold RH onto joint pipe.

7) Remove  the  center  exhaust  pipe.  <Ref.  to

EX(STI)-8, REMOVAL, Center Exhaust Pipe.>

8) Remove the turbocharger. <Ref. to IN(STI)-15,

REMOVAL, Turbocharger.> <Ref. to IN(w/o STI)-

14, REMOVAL, Turbocharger.>

9) Take off the joint pipe in the upward direction.

B: INSTALLATION

Install in the reverse order of removal.
NOTE:

Use a new gasket.
Tightening torque:

42.5 N·m (4.3 kgf-m, 31.3 ft-lb)

Tightening torque:

19 N·m (1.9 kgf-m, 14.0 ft-lb)

C: INSPECTION

1) Check  the  connections  and  welds  for  exhaust

leaks.

2) Make sure there are no holes or rusting.

IN-00203

EX-02260

EX-00018

EX-00018

EX-02260

EX(STI)-13

Rear Exhaust Pipe

EXHAUST

5. Rear Exhaust Pipe

A: REMOVAL

CAUTION:

Vehicle  components  are  extremely  hot  after

driving. Be wary of receiving burns from heated

parts.

1) Lift up the vehicle.

2) Remove the center exhaust pipe from rear ex-

haust pipe.

3) Remove the muffler from rear exhaust pipe.
CAUTION:

Be careful not to drop the rear exhaust pipe.

• 4 door model

• 5 door model

4) Apply a coat of spray type lubricant to the mating

area of cushion rubber.

5) Remove the rear exhaust pipe from the cushion

rubber.
CAUTION:

Be careful not to let the muffler contact the rear

bumper.

B: INSTALLATION

1) Apply a coat of spray type lubricant to the mating

area of cushion rubber.

2) Install the rear exhaust pipe to cushion rubber.
NOTE:

After  assembling,  degrease  the  lubricant  which

was applied to the cushion rubber while removing/

installing.

3) Install the rear exhaust pipe to the muffler.
NOTE:

Use a new gasket and self-locking nut.
Tightening torque:

48 N·m (4.9 kgf-m, 35.4 ft-lb)

• 4 door model

EX-02229

EX-02707

EX-02274

EX-02795

EX-02795

EX-02707

EX(STI)-14

Rear Exhaust Pipe

EXHAUST

• 5 door model

4) Install  the  center  exhaust  pipe  to  rear  exhaust

pipe.
NOTE:

Use a new gasket.
Tightening torque:

18 N·m (1.8 kgf-m, 13.3 ft-lb)

5) Lower the vehicle.

C: INSPECTION

1) Check  the  connections  and  welds  for  exhaust

leaks.

2) Make sure there are no holes or rusting.

3) Check the cushion rubber for wear or crack.

EX-02274

EX-02229

EX(STI)-15

Muffler

EXHAUST

6. Muffler

A: REMOVAL

CAUTION:

Vehicle  components  are  extremely  hot  after

driving. Be wary of receiving burns from heated

parts.

1) Lift up the vehicle.

2) Remove the rear exhaust pipe from the muffler.

• 4 door model

• 5 door model

3) Apply a coat of spray type lubricant to the mating

area of cushion rubber.

4) Remove the muffler from the cushion rubber.
CAUTION:

Be careful not to drop the muffler during remov-

al.

• 4 door model

• 5 door model

B: INSTALLATION

Install in the reverse order of removal.
NOTE:

• Use a new gasket and self-locking nut.

• After assembling, degrease the  lubricant which

was applied to the cushion rubber while removing/

installing.
Tightening torque:

48 N·m (4.9 kgf-m, 35.4 ft-lb)

• 4 door model

• 5 door model

C: INSPECTION

1) Check  the  connections  and  welds  for  exhaust

leaks.

2) Make sure there are no holes or rusting.

3) Check the cushion rubber for wear or crack.

EX-02707

EX-02274

EX-02796

EX-02797

EX-02707

EX-02274