So about a month ago it got to freezing temps here which rarely happens. anyways i had water in my radiator at that time from a recent radiator change. Well **** froze overnight. I came home from work and instantly put it in my house and let it thaw out. Well all the ice melted and waited till it warmed back up and brought it outside, put antifreeze in it, and then started it. It ran great and the only place that was leaking was from the waterpump. I took it apart and found out that the bolt that holds the impeller to the shaft broke off inside the shaft. I tried using an extractor but that didnt work at all. So now i have to get a new impeller shaft. Only problem is i dont know how to remove it. Any ideas on how this is done?