What do you mean by "print head"? Do you mean heat-block? What are you trying to disassemble from it, the throat and nozzle? On other hotends I've used a crescent wrench to hold the heat-block and then used the closed end on a wrench to get the nozzle out. I checked the 0.4mm nozzles I have and they require a 6mm wrench. Deep-well sockets make it easier to get the nozzle separated from the heat-block.
figured it out, but the print head won't come off