you said nothing comes out the bleeder, if you loosen the line does fluid come out?
are the pistons bottomed out preventing the pads from releasing?
with the calipers still mounted put a clamp on them and compress. do the pistons retract enough for some, 1/16" , of clearance between pad & rotor?
here it helps to open the bleeder and expel the fluid instead of forcing it back into the lines.
if it does compress, it should, can you move the caliper in & out with only hand pressure? you should be able to. that tests the slider pins.
remove only the caliper, leave the pads in the bracket. can you now move the pads with very little force or are they jammed tight in the bracket?
secondary test, with the caliper removed put a clamp on the pads & tighten. remove the clamp, do the pads release the rotor?
do the pads have a thick backing shim?
during the first 100 feet of driving, before they get hot, do the brakes work ok? and release?
during installation/maintenance I like to work the piston seals.
place something in the caliper that stops the pistons after about 1/2" travel. anything, pads plus block of wood, whatever.
pump the brakes to push the pistons out, then push the pistons back in, repeat a couple times.
this gets a film of fluid under the seals.
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