Spark Plug - Subaru LEGACY 2004 Service Manual

2. Spark Plug

A: REMOVAL
CAUTION:
All spark plugs installed on an engine must be
of the same heat range.
Spark plug:
<Ref. to IG(H4SO 2.0)-2, SPECIFICATION,
General Description.>
1. RH SIDE
1) Disconnect the ground cable from battery.
2) Remove the air cleaner case. <Ref. to IN(H4SO
2.0)-6, 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.
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
NOTE:
The above torque should be only applied to new
spark plugs without oil on their threads.
In case their threads are lubricated, the torque
IG-00017
should be reduced by approx. 1/3 of the specified
torque in order to avoid over-stressing.
2. LH SIDE
Install in the reverse order of removal.
Tightening torque:
21 N
NOTE:
The above torque should be only applied to new
spark plugs without oil on their threads.
In case their threads are lubricated, the torque
IG-00018
should be reduced by approx. 1/3 of the specified
torque in order to avoid over-stressing.
IG(H4SO 2.0)-5
⋅
m (2.1 kgf-m, 15.2 ft-lb)
⋅
m (2.1 kgf-m, 15.2 ft-lb)
IGNITION
IG-00021
IG-00022