Impreza 2.5 RS Sedan AWD F4-2.5L SOHC (2002)
7. Install the cam ring to the front casing with alignment mark facing forward.
8. Install the rotor to the front casing with groove facing rearward.
9. Install the 10 vanes into the rotor with their nose radius facing toward cam ring.
10. Install the cam ring to the front casing, securing with knock pins.
CAUTION: Do not use hammer to fit knock pins in position.
11. Mount the O-ring on the front casing.
12. Using STs, press the retaining ring into the shaft groove.