Subaru Impreza 2003 Service Manual page 1099

2. Front Exhaust Pipe
A: REMOVAL
1) Disconnect the ground cable from battery.
2) Remove the front oxygen (A/F) sensor. <Ref. to
FU(H4DOTC)-44, REMOVAL, Front Oxygen (A/F)
Sensor.>
3) Remove the under cover.
4) Remove the lower exhaust manifold cover (RH).
5) Remove the lower and upper exhaust manifold
covers (LH).
6) Remove the bolts and nuts which hold the front
exhaust pipe assembly to turbocharger joint pipe.
7) While holding the front exhaust pipe assembly
with one hand, remove the nuts which hold the front
exhaust pipe assembly to cylinder head exhaust
port.
8) Remove the front exhaust pipe assembly.
9) Remove the covers from exhaust manifold and
front exhaust pipe.
FRONT EXHAUST PIPE
10) Separate the front exhaust pipe from exhaust
manifolds.
B: INSTALLATION
FU-00009
NOTE:
Replace the gaskets with new ones.
1) Assemble the front exhaust pipe and exhaust
manifolds.
Tightening torque:
35 N·m (3.6 kgf-m, 26.0 ft-lb)
EX-00131
2) Install the front exhaust pipe covers.
Tightening torque:
25 N·m (2.5 kgf-m, 18.1 ft-lb)
3) Install the upper exhaust manifold cover (RH).
Tightening torque:
19 N·m (1.9 kgf-m, 13.7 ft-lb)
4) Install the front exhaust pipe assembly.
Tightening torque:
35 N·m (3.6 kgf-m, 26.0 ft-lb)
EX-00132
EX(H4DOTC)-7
EXHAUST
EX-00148
EX-00148