Impreza RS Coupe AWD F4-2.5L SOHC (1999)
3. Remove spark plug with the spark plug socket.
4. 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)
3. #3 SPARK PLUG
1. Disconnect battery ground cable.
2. Remove air intake duct and air chamber.
1. Remove bolt which installs air intake duct on the front side of body.
2. Remove bolt which installs air intake duct on body.