Subaru 2009 IMPREZA Service Manual page 391

IGNITION
2. Spark Plug
A: REMOVAL
Spark plug:
Refer to "SPECIFICATION" for the spark
plug. <Ref. to IG(H4SO)-2, SPECIFICATION,
General Description.>
1. RH SIDE
1) Disconnect the ground cable from the battery.
2) Remove the air cleaner case. <Ref. to
IN(H4SO)-5, REMOVAL, Air Cleaner Case.>
3) Remove the spark plug cords by pulling the boot.
(Do not pull the cord itself.)
4) Remove the spark plug with a spark plug socket.
Spark Plug
2. LH SIDE
1) Remove the battery. <Ref. to SC(H4SO)-22,
REMOVAL, Battery.>
2) Remove the spark plug cords by pulling the boot.
(Do not pull the cord itself.)
3) Remove the spark plug with a spark plug socket.
IN-00203
B: INSTALLATION
1. RH SIDE
Install in the reverse order of removal.
Tightening torque:
21 N·m (2.1 kgf-m, 15.5 ft-lb)
IG-00017
2. LH SIDE
Install in the reverse order of removal.
Tightening torque:
21 N·m (2.1 kgf-m, 15.5 ft-lb)
IG-00018
IG(H4SO)-4
IG-02049
IG-00022