I suspect my rear caliper (Bendix) has seized on my 1.9 GTi, so I've taken it off to have a look at. I'm trying to get the piston out, but with no joy. I've twisted the piston a long way out, but can't seem to get it free. I've also tried using a bicycle pump to force some air in there to push it out with no success - I just build up lots of pressure which causes the remains of the brake fluid to spurt everywhere when I remove the pump, yuk! I know an air compressor would provide more pressure to do this, but its what I've got to hand at the moment.
Is there something I'm not doing right? I would expect the piston to move outwards with the application of air, but it doesn't seem to, but it twists out easily enough. I know the piston has to be aligned (rotated) correctly when fitting the pads, which I've done when applying the air.