4 replies to this topic

[Spitz]

I Believe the inside piston of one of my calipers is sticking.....meaning it will not recede back into the cylinder.
What is the fix for this.
Car still drives, but after a few miles and a few brakes it will start making that awful noise.

brakes are standard 8.4"

Thanks

[GraemeC]

Strip and rebuild with new seals and pistons (if required).

[Mr Joshua]

Low pad material will do the same. Change your pads first and save the agro.

[Spitz]

Strip and rebuild with new seals and pistons (if required).

That's the answer I knew in the back of my mind.

However, last night after posting, I went out and fiddled around.

I removed the caliper, took out the pads and pushed both pistons in all the way.
After putting back together I took for a drive, putting the brakes to work. The piston didn't stick.
But...I do have major brake squeel from the offending corner. Typically at very low speed approaching a stop. (?)

So for now, I know I'll need to pull and go over them, I'm hoping it was a ridge of muck or grime that perhaps I cleared when pushing the piston in.
Possible?

MINI driving seaason for me will be over soon, so at that point I'll pull them offf and put kits in.

[bobs]

Original chromed pistons? could've just freed up a bit of rust...

If you decide to re-build I suggest to fit the newer stainless pistons, new seals (good luck, pita!) and new pads, also check the discs/rotors for wear.

I fitted new discs and pads and they squeeled for a couple of weeks when bedding in, so be patient, after that, sweet as a nut, a sweet nut, not a salted one...

I think you always need to fit new pads with discs, but can fit new pads without fitting new discs if your discs are fine. pads are pennies.