my brakes have been fighting me every step of the way. Took 24hrs of soaking with penetrating oil and then a good blow with the hammer on the ratchet to get the bolts loose. Now that I have them out I can't get the cylinder apart. The fronts came apart fine but the rears do not want to move. Everything I have found says to hook the compressor up to them and pop them out but I have given them full air and all it does is blow the line out of the back. Is there something I am missing?