Passenger side caliper loose...

[baseballfan416]

A few weeks back I replaced my front pads/rotors after noticing a loud whoop whoop noise coming from my passenger side front brakes. Thought nothing of it, pads and rotors were cheap "prime choice" ebay pads/rotors with 50k, so I got a set to replace them. Tons of pad life left but I assumed the rotors were shot because well… They were cheap.

When changing out the front passenger side, the bottom caliper slider bolt appeared to have seized. With coaxing, I was able to get the bolt out, regrease/reinsert and everything seemed fine. Piston compressed back into place, slider bolts moved freely, and so I was pretty confident that the original noise was just warped rotors. Brake pedal was primed and I noticed drastic improvement in braking performance/pedal feel. That was about 3 weeks ago.

However, I think I am back to needing a new bracket. The pedal feel/performance is still there. However, I've got a metal clank noise coming from that caliper, along with a return of the whoop whoop noise upon brake engagement. The caliper is loose on the bracket and you can visibly shake it. It's not horrible but theres definitely more play and the driver side doesn't have it. The piston moved back in when I redid the brakes and I know it's not seized because of equal wear from the driver side rotor.

Any thoughts? I'm thinking the bracket bolts are somehow warped so when the brake pedal is depressed, something is getting hung up causing the bracket to not line up properly?