Quote:
Originally Posted by flash968
the only times i've seen warped rotors, the calipers were not lined up correctly. when the rotors then got hot, and then cooled down, they did so off axis, causing warping.
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When I rebuilt front calipers, what I found was the caliper slide rail grooves could get rusty and hang up. This would cause the calipers to get mis-aligned and not release fully and "possibly" cause hot spots on the pads. I used a small triangular file and emery cloth to lightly dress the caliper grooves and slide rails to remove any rust. Then grease with synthetic caliper grease and reassemble. The brakes worked much smoother, then.
As far as the caliper bore went, I did the absolute minimum which was to clean with brake clean and replace the rubber seals. No reboring or anything as I didn't want to damage the fit.