Impreza RS Coupe AWD F4-2.5L SOHC (1999)
4. Remove #3 spark plug cord by pulling boot, not cord itself.
5. Remove spark plug with the spark plug socket.
6. Installation is in the reverse order of removal.
Tightening torque (Spark plug):
20.6 ± 2.9 Nm (2.10 ± 0.30 kg.m, 15.19 ± 2.14 ft.lb)
4. #4 SPARK PLUG
1. Disconnect battery ground cable.
2. Disconnect washer motor connector.
3. Disconnect rear window glass washer hose from washer motor, then plug connection with a suitable cap.
