i managed to release a stuck piston on my driverside front caliper yesterday, so i could change the pads.
i got to the nearside, where 3 pistons were stuck, so i pressed on the brake pedal to free them, now all four pistons are stuck against the disk
any ideas how to free them? it looks like one of them is leaking, also the pads on this side were no where near as worn on the driverside, do i need new caliper? on can i just change the pistons? im guessing one of the pistons is pitted.
thanks
J

 

You can just service the calipers. Remove the pistons, inspect for damage and replace if required, give everything a good clean, fit new seals and off you go.

 

thanks, where can i get the pistons and seal from?

 

oh ye and how do i bleed once done?

 

Give this guy a shout: https://www.scoobynet.com/member.php?u=114250

 

You'd be unlucky to have to replace the piston (but obviously need to be inspected for condition).

As said, a new seal kit and you're done. I'd overhaul both calipers/all seals though....