Impreza F4-2.5L (2008)
1) Wipe off any sand, dust, oil or water from the pulley grooves with a cloth.
2) Wipe off any oil, water, mud or rust attached to the front side of the crank pulley with a cloth.
3) Turn the crank pulley to the right slowly, until the crank pulley service hole near the top.
CAUTION:
Never turn the crank pulley to the left.
4) Attach a new rear side belt on the A/C compressor pulley.
5) Insert the claw of the belt stopper (A) into the lower hole (B) on the compressor bracket as shown in the figure, and attach using bolt (C).