Join Date: Jul 2007
Location: New Zealand
And related to Alfa-Red's suggestion... I've found on disc rear brake setups that it helps to slacken the handbrake cable right off before you wind the pistons back. On the 156, the adjuster is a long 13mm nut on the lever itself (I presume the GT is the same), which you reach by undoing the gaiter (nice easy job inside the car).
After you assemble the rear brakes, operate the footbrake dozens of times to allow the rear brakes to self-adjust, then (and only then) tighten the handbrake cable to give an appropriate number of clicks and good lever feel.
I adopted this approach also because rear disc brakes often won't self-adjust if the handbrake cable is too tight. I've seen it a few times where someone swinches up the handbrake adjustment because they're obsessed with only having 3-4 clicks, then a year or two later the rear brakes are hardly working because no self-adjustment has taken place...
One other thing (and this is probably the answer you were looking for, which I don't know - EDIT: David C does, see below - thanks!) - on some cars of similar age (FIAT Stilo Abarth springs to mind) the rear caliper pistons have to be wound back in opposite directions (one side needs clockwise rotation, the other side needs anticlockwise rotation). Most cars only require clockwise rotation of the pistons. Normally the pistons do not require much force to turn and should start moving in/out without the need for a G-clamp to force them in (don't be tempted to use a clamp as that will cause damage).
'00 GTV V6, '08 FIAT 500, shell and parts for a '71 FIAT 850 Coupe
Last edited by alexGS; 04-06-10 at 19:07.