I just wanted to pass on a trick that I just found when removing really rusty brake rotors. I'm sure some of you may already know about this trick, but if you don't, it works great! I was changing out my brakes (pads and rotors) which were on the car since I bought it a few years ago. Needless to say, rotors were bonded by rust to the hub. I got sick of pounding on the rotor to loosen it with no luck, since the Volvo 850 rotors have no threaded hole to use a bolt and push against the hub while pulling the rotor. I then found this trick that utilizes the holes where the caliper bracket mounts to the steering knuckle. All you have to do is buy long bolts (about 2.5 inches) that are big enough to do the job, but small enough to fit through the holes (I used 3/8 inch bolts). Place these bolts through the hole and then place a washer and nut on the opposite side of the hole. Using the counter rotation, the bolt places constant pressure with every turn on the rotor, easily breaking it free. Additionally, if you have very rusted rotors like I did and the bolt just runs itself through the rust, you can use a 1/8 or 3/16 inch thick metal shim and place that in between the bolt ends and the rotor to get the surface area and spread needed to put pressure on the rotor, breaking it free. This saves so much time from beating on the rotors from the back. Again, sorry if this is redundant information for some, but I think others should be able to benefit from this!
-Lee