Went to the builders yard this morning and when i got there i could smell cooking brakes. Got out for a look and passenger front wheel was smoking hot.
Got it home driving slower and using the brakes as little as possible, and i've pulled the corner apart hoping it was just a stuck slider, except i cant actually see anything wrong.
sliders are free, pads werent even stuck in the carriers. I lifted the pistons boots and the pistons are shiney clean. I then got a G clamp, and if i push one piston in, the other pops out and vice versa, very little force needed, suggesting the pistons themselves are free. Now heres where it gets really odd...
I put a block of wood in the caliper leaving about 10mm of space, jumped in and pressed the brake pedal, in an attempt to push the pistons out some more, so i could check for rust, except nothing happened. The space remained at 10mm. I turned the ignition on and charged up the brake pump and properly heaved on the pedal... same thing.
Got a chunk of metal across both pistons and managed to force them both back 5mm or so with the g clamp. Reinstalled the caliper on the car. Since i pushed the pistons back theres now a 5mm gap between the caliper and pads. Stomped on the pedal as hard as i could inside the car, but the gap didnt close.
So what on earth is going on here!?!
One minute they're stuck on, and now they;re not getting any pressure at all?