i dont know how you are gonna burn them out. i tried to burn one out and after having a torch on it for 10 minutes it wasnt even a quarter of the way through. maybe i needed something hotter but a torch should do it. pressing them back in was the easy part. i dont know if you got the metal part around the rubber out or not. to do it properly it should be removed and then the urethane bushing will slide right in. you can also do it with an air chisel or just with a hammer and cold chisel. but to do it the right way you should use a press