when is it time to rebuild caliper?

[KZEVO]

i searched but didn't find much so hoping if people can explain when its time to get the caliper rebuilt. Do i need a rebuild if the dust boots are shot? Or do the inside seals have to give and leaking for a caliper to require a rebuild?

I have 65K on the car with about 8-10 track days, the dust sheilds are busted, but don't see any leaks.

I'm getting very loud squeak/groan noise when applying the brakes and the noise gets louder the harder you get on the brakes. pads have a bit of life left, but wondering if its just the pads (keep in mind not talking squealing here). is there a way to check if the pistons are all working right. i don't have anyone that can sit in the car and press the pedal for me to see if all 4pistons work.

thanks

[KZEVO]

mods, please delete or close this thread. Posted in the wrong section and have moved the post to the regular brakes and suspension section. thanks

[ForcedFedRS]

Retract the pads to the calipers, since you say you have a little pad life left, you should be able to get a decent size gap, then press the pedal. You should be able to see the piston distance close up.