If the rotor is rusted tight, it is seated properly. Nothing got behind it while it was bolted in place with the wheel.
One thing to be aware of is while many people use c-clamps to push the pistons into the calipers, that should never be necessary. If that is the only way to get the piston in, there is a rust or scale problem that is going to cause trouble. If the pistons are clean and free, they will slide in easily by prying them in with a flat-blade screwdriver as a lever before you remove the caliper.
I think you guys found the problem with the slides. Once they're freed up, use a high-temperature brake grease to lubricate them. "Rusty Lube" is one trade name I'm familiar with but there are many other good products. If you get any penetrating oil on the pads or rotors, be sure to wash it off. Once the brakes get hot, any grease or oil will soak into the linings and cause a squeal.
Monday, May 30th, 2011 AT 9:44 PM