Impreza WRX STI F4-2.5L DOHC Turbo (2007)
3. Remove the ignition coil and ignitor assembly.
4. Remove the spark plugs with the spark plug sockets.
INSTALLATION
RH SIDE
Install in the reverse order of removal.
Tightening torque (Spark plug): 21 N.m (2.1 kgf-m, 15.2 ft-lb)
Tightening torque (Ignition coil and ignitor assembly): 16 N.m (1.6 kgf-m, 11.7 ft-lb)
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 should be reduced by approx. 1/3 of the specified torque in order to avoid over-stressing.
LH SIDE
Install in the reverse order of removal.
Tightening torque (Spark plug): 21 N.m (2.1 kgf-m, 15.2 ft-lb)
Tightening torque (Ignition coil and ignitor assembly): 16 N.m (1.6 kgf-m, 11.7 ft-lb)
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 should be reduced by approx. 1/3 of the specified torque in order to avoid over-stressing.