The piston turning tool is only used for rear disc brakes with the parking brake assembly built into the calipers. Before you unbolt the front calipers, slowly pry the pistons in with a flat blade screwdriver to make room for the new pads. If the pistons won't move that way, there is dirt or rust pits on them that will cause them to stick. To prevent them from sticking, they must be replaced or rebuilt.
Be sure to use high temperature brake grease on the backs of the pads and on the caliper mounting points. Clean all of those points first with a flat file to remove built up rust and dirt, anything that will prevent the pads from sitting flat against the caliper, and that will prevent the caliper from sliding freely.
caradiodoc
caradiodoc
April 2010