Impreza L Sedan F4-2.2L SOHC (1997)
6. Remove V-belt(s). Refer to Engine.
7. Remove timing belt. Refer to Engine.
8. Remove belt tension adjuster. Refer to Engine.
9. Remove camshaft position sensor.
10. Remove left-hand camshaft sprocket by using ST 499207100 camshaft sprocket wrench, or equivalent.