Greetings.. I'm sitting here trying to take off the old rotor so I can put on the new upgraded one. However, I can't get the old one to budge.. I did get the kit that came with the proper puller. It just feels like I'm going to break off the crank shaft as hard as I am wrenching it.. I did have to heat the nut the retaining nut in order to get it to break loose. I have heated the bigger part also. I'm just afraid that I will melt any seals.. are they normally this hard and any other ideas ? Thanks much..