Subaru Impreza 2004 - Page 201

EX(H4SO)-7
EXHAUST
Front Exhaust Pipe
9) Remove the front and center exhaust pipe as-
sembly from vehicle.
CAUTION:
• Be careful not to let the front and center ex-
haust pipe assembly fall off when removing as
it is quite heavy.
• After removing the front and center exhaust
pipe assembly, do not apply excessive pulling
force on the rear exhaust pipe.
10) Separate the front exhaust pipe from center ex-
haust pipe.
11) Remove the front oxygen (A/F) sensor and the
rear oxygen sensor. <Ref. to FU(H4SO)-43, RE-
MOVAL, Front Oxygen (A/F) Sensor.> and <Ref. to
FU(H4SO)-45, REMOVAL, Rear Oxygen Sen-
sor.>.
B: INSTALLATION
1) Install the front oxygen (A/F) sensor and the rear
oxygen sensor. <Ref. to FU(H4SO)-43, INSTALLA-
TION, Front Oxygen (A/F) Sensor.> and <Ref. to
FU(H4SO)-45, INSTALLATION, Rear Oxygen
Sensor.>.
2) Install the front exhaust pipe to center exhaust
pipe.
NOTE:
Replace the gaskets with new ones.
Tightening torque:
30 N·m (3.1 kgf-m, 22.4 ft-lb)
3) Install the front and center exhaust pipe assem-
bly to vehicle.
4) Temporarily tighten the bolt which installs the
front and center exhaust pipe assembly to hanger
bracket.
5) Tighten the nuts which hold the front exhaust
pipe onto cylinder heads.
Tightening torque:
30 N·m (3.1 kgf-m, 22.4 ft-lb)
6) Install the under cover.
7) Tighten the bolts which install the front and cen-
ter exhaust pipe assembly to rear exhaust pipe.
Tightening torque:
18 N·m (1.8 kgf-m, 13.0 ft-lb)
• 1.6 L
EC-00011
EC-00011
EX-00038
EC-00009
EX-00125