Here is an excerpt from my recent rebuild adventure ...
So gang, the rebuild kit arrived. Here is what I discovered:
1) The sliders were actually OK, at least they slide manually with the same effort before/after my cleaning and lubing.
2) The piston air valve DID have fluid behind it, indicating a bad piston, a la Ogre Cave. With the piston out the caliper bore was chockablock full of sediment and sludge ... it really looked bad. Sorry, in my zeal to clean and rebuild I didn't get a picture of the sludge. By far the worst I have ever seen. I think this solves the mystery of the stuck caliper.
So, I used Incomutt's excellent procedure w/pictures to take apart and clean the piston and replace the seals. The only part you don't get in the kit is the inside piston seal, which if bad would give one the leaky piston air valve. Since the seal and the mating surface looked OK and felt smooth I decided to 'go for it.. I have flushed the Line with fluid and believe I should do the other lines and rebuild those calipers as well -- they must also be filled with sludge and crap, although the other three seem to work fine.
Here's the Link: http://www.fiero.nl/forum/A...110502-2-101129.html