Brake calipers not releasing fully... what did I do wrong?
#13
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the reason this happens is that your fluid level goes down as your pads wear. If any fluid was ever added while the pads were worn, then when the calipers are compressed for new pads that excess fluid has to go somewhere. If you didnt remove the excess fluid during the pad change, then the excess fluid will create backpressure in the system.
#14
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Granted... but I did not add any fluid. OTOH, dealer might have.
I've been treating this as a more-or-less closed system, which I guess it is not. It certainly can't hurt to check the brake fluid level, especially since it's time to replace it anyway.
#17
...which is why you really should open the bleeders when retracting the pistons..
instead of trying to force the fluid upstream, it pushes it out into your cup. This will get the old dirty fluid out of the caliper, and allow newer fluid in.
#19
How much resistance?
If you can still turn the wheel, I'm not certain I would be worried. Drive it around and see what happens. If you smell something burning, or the rotors/wheels get VERY hot after a few minutes of driving, you have a problem. If everything seems find, the resistance might be coming from the rear differential or just minor contact between the pad and rotor.