Andy A wrote:Seized calipers can sometimes be easier to fix than you think.
What often happens is that the rubber seal round the piston stops being airtight.This allows air and moisture in and the piston corrodes.
If you peel back the rubber seal you can look inside and see if this is the case.
The corrosion is usually like a white powder but it can be out and out rust.
If the piston is pitted or weakened in any way this is potentially dangerous so if it doesn't look good then dump it.
However if the corrosion is mild all it does is
makes the piston
"sticky" and prone to running a hot wheel.
You can bodge this while the brake is on the car but I advise a proper strip and clean.
Quick bodge
: You can remove the calliper and pump the piston most of the way out.
Clean it off
(I use fine wet and dry) and make sure it is
*spotlessly clean* before applying RED brake grease, sparingly and pushing it back in.
Use babies Q tips to get into the cracks and clean any dust out.
Red brake grease is the kind that can come into contact with rubber so it won't rot the seals.
Don't use any other kind.
It's also worth replacing the rubbers if they look a bit saggy, it's the first line of defence against crap.
You often get sticky pistons at this time of the year because road salt gets in there.
However please remember that I'm only talking about pistons in great condition.
If it doesn't look perfect when you clean it up then dump the lot and replace.
I have done this for a number of cars over the years, I had a GT6 once that was prone to brake drag for exactly the same reason and it really robs you of power, not to mention the smell of burning brakes!
damn 5th Lumber Disc 
