DOHC Model

Recommended spark plug: 

Refer to ELECTRICAL , Forester.

1. RH side
   1. Remove the collector cover.
   2. Disconnect the ground cable from the battery.
      Fig 1: Removing Collector Cover

      Courtesy of SUBARU OF AMERICA, INC.
   3. Remove the air cleaner case. Refer to REMOVAL , Air Cleaner Case.
   4. Disconnect the connector from ignition coil.
   5. Remove the ignition coil.
      NOTE: Turn #3 ignition coil by 180 degrees to remove it.
      Fig 2: Locating Air Cleaner Case

      Courtesy of SUBARU OF AMERICA, INC.
   6. Remove the spark plug with a spark plug socket.
   7. Install in the reverse order of removal.

      Tightening torque (Sparkplug): 

      21 N.m (2.1 kgf-m, 15.5 ft-lb) 

      Tightening torque (Ignition coil): 

      16 N.m (1.6 kgf-m, 11.8 ft-lb) 

2. LH side
   1. Remove the collector cover.
   2. Remove the battery and battery carrier.
   3. Disconnect the air duct from the secondary air pump.
   4. Remove the bolts that attach the air pump duct to the rocker cover (LH), and raise the air pump duct.
      Fig 3: Locating Air Pump Bolts

      Courtesy of SUBARU OF AMERICA, INC.
   5. Disconnect the connector from ignition coil.
   6. Remove the ignition coil.
      NOTE: Turn #4 ignition coil by 180 degrees to remove it.
      Fig 4: Locating Connector Of Ignition Coil

      Courtesy of SUBARU OF AMERICA, INC.
   7. Remove the spark plug with a spark plug socket.
   8. Install in the reverse order of removal.

      Tightening torque (Spark plug): 

      21 N.m (2.1 kgf-m, 15.5 ft-lb) 

      Tightening torque (Ignition coil): 

      16 N.m (1.6 kgf-m, 11.8 ft-lb) 

      Tightening torque (Air pump duct): 

      9 N.m (0.9 kgf-m, 6.6 ft-lb)