I have a 2003 Mini Cooper S (R53) the right rear pads were worn so I changed them. However during this process I discovered that the piston in my calliper was getting stuck out. I have tried winding it in and it just keeps getting stuck out? Do I just need to get a new calliper fitted or is there any way I can fix this?
Also everytime I drive it ATM my actual wheel is getting hot due to the brakes being on all the time! I am now not driving it until I get this resolved.
Personally I would take it to a brake specialist who may be able to clean up the caliper and piston and rebuild it with new seals, get a quote on an overhaul as opposed to a replacement unit. Compare the cost of both options. Also, did you bleed your brakes after fitting the new pads to ensure no contaminated fluid or air bubbles were in the system.
You can re seal them yourself with a few tools and a bit of knowledge, and providing the kits is available, but you really ought to take it apart first and strip it because if the piston is badly corroded/pitted then a reseal wont work.
I know it means the car being off the road longer this way so it might not be practical for you to do this.
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