Bleed isn't necessary but ain't gonna hurt (v cheap insurance especially after pushing all that fluid upstream back into reservoir and again down stream resetting pads against rotor. Who knows what in brake lines could've shaken loose. Regardless, trying to help you find cause by understanding all done. Which has me wondering a bit...
Quote:
- replace any hardware - caliper bolts, retaining spring, retaining pin, etc.? SPRINGS REPLACED
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There shouldn't be ANY play b/w top of pads & spring. In fact you should have to push down reasonably on spring in order to get retaining pin & spring cotter pin (stop) re-engaged. The pad 'ears' likewise should be firmly seated in caliper to boot.
Can you post a photo of FL caliper (even thru wheel opening could help). And of course, measure new pads upon arrival against these current pads for sizing.
Did you do anything else to vehicle aside from pads & rotors at same time?
Sounds are really hard to trace seated within... try and get someone to stand outside car next to stop and listen for clicking noise you hear to further narrow source.
Good luck