2016 RT rear brake caliper piston wouldn't screw in - anyone else has run into this?

[scwingman]

Put brakes on a friend's 2016 Spyder RT yesterday. Could not get the piston to screw in. Finally put a C-clamp on it and it pushed in. I thought all Spyders from 2013 on had the screw in pistons. The piston did have the 2 holes in the face for the tool.
Just wondering if anyone else has run into this?

 

[BajaRon]

The rear caliper piston on all Brembo brake calipers, used on 2013 Spyders and later, screw in UNLESS they unscrew so far that they lose contact with the threads. At this point you have to press the piston back against the threads and turn it to reengage the threads. Not an easy assignment due to the heavy spring behind the piston.

 

[Snoking1127]

Sounds like maybe OP has destroyed the threads, and will be looking at a new caliper?

 

[BajaRon]

Sounds like maybe OP has destroyed the threads, and will be looking at a new caliper?

I didn't want to say it. But I fear that you could be correct. Sometimes that rear piston gets stuck, for one reason or another. It can be difficult to spin without the proper tool.