[Bob Kontak]

Learned a new one today or my memory was refreshed.

Rotors and pads on a 2014 Hyundai Sonata. Rotors are turn-able with 70k. Shop down the road has a machine. $10 cash each.

Put them on with pads and new bracket hardware. Brakes are vicious yet there are scratchy noises......everywhere. Rotational rubbing.

Turns out there is slag rust on the outside diameter of the turned rotors 1/32nd to 1/16th inch thick. Rubs on the new bracket tin.

All four wheels off, tippy tap with a hammer to shatter off the rust build up. Silent now.

Had I known or remembered this, it was only a 10 minute job max to tap the grunge off when on the bench.