The pulley is only secured to the output shaft by strong glue, and all it takes is a heat gun, pliers, and someone pulling for it to come off.
See this thread (
http://www.chiefdelphi.com/forums/sh...light=heat+gun ) there is no need to take the risk of hurting the motor by breaking the pulley like that and there is no need to buy a custom tool to remove the pulley.