The 307 rear caliper requires pressure whilst turning the piston to reset them. A G cramp and mole grips will do the trick no problem, I've just done it!
Bryan
Bryan Ascroft., July 2008
It would appear that the piston on the caliper has come out to far.
You need to turn the piston back while applying pressure as well while you turn it.
There is a tool you can buy for this or maybe even hire one.
chris, January 2006
Thanks bg, but I tried screwing it in, it turns but doesn't go in.
Putain Pug, January 2006
Might have to have special tool but most can be screwed back into the caliper with a large set of pliers
