3 - These pisrons require to be wound clockwise as they're pushed back in. This "rewinds" the handbrake mechanism within the caliper. The Blue Point special tool used, has two lugs on the end piece that locate into the piston and turn it as the piston returns.
I am an ex-time served mechanic and worked in the trade for over 9 years. This was the first time I'd done a set of pads on the Scenic, and before I even attempted the job I had asked a Renault Tech of there was anything specific I had to look out for when doing this job. His only remark was that the piston had to be wound back into the caliper and not just pushed back. I didn't want to take the chance on wrecking the calipers, so I did as he suggested.
No doubt there are cars who's rear caliper pistons can be just pushed back, but this isn't one of them.
On a slightly different note, it was a pleasure to find someone willing to give a little bit of info to help me out AND
lend me the tool to do the job
OMG! Really? And for 9 years you haven't learnt that brake pushpistons are NEVER turned because the seals (thin rubber O-rings around the piston) tear off?
Man, I am no mechanic, but even I know there's completely different way of releasing hand brake cable.
And what's more - why even bother release the handbrake cable? What will happen in your "expert" opinion if you just push the piston back w/ tool or no tool?
Hey, do you recall - there's a guy here in this forum who complained about brakes failure and strage smell.
Maybe just some "expert" like you turned his pistons too.
And in order not to bring the discussion on a lower level - please do refer to a single Renault Technical note specifying turning of brake piston in release of handbrake cable.
For 9 years in the job you should be familiar with Renault TNs right?
Shish, people be careful when giving advice. Someone might get hurt this way.