I started off with a simple alternator problem so I ordered my alternator bought a new battery and let my older brothers dad replace it so two days later I go to the store and when I return he has the belt that I believe believe belongs to the alternator so I take a lookin the engine and no surprise their is no belt and also the pulley is loose and there was another piece I believe has something to do with the tension the bolt was broke in half In the actual screw part so. Can n e one help what the heck did he do