Sticking brake caliper, 88 90 2wd

[David Weiss <dzweiss@worldnet.att.net>]

dennisr@altia.com wrote:

> Does anyone have any advice wrt a sticking rear caliper?

> I went to replace the pads today and cannot get the piston to restract,
> even if I open the bleeder hose or go so far as to remove the caliper
> from the hydraulics entirely.

Screw it (literally).  The rear pistons typically must be screwed
clockwise while pushing.  It can take a number of turns before you see
them start to move.  If there are two indentations across a diameter of
the piston face, this is probably your setup.  There is a nifty tool
that looks like a cube w/ pins sticking out that will help immensely. 
Cost ranges from <$10 to $20, depending on brand and where you buy; many
auto parts stores carry this.  It fits on a 3/8 drive; best way I've
found is to put a 1/4 x 3/8 adapter on it, and run it w/ a 1/4-drive
nutdriver handle.  I filed two of the pins _slightly_ to get a perfect
fit.

--Dave Weiss
  '91 V8 5-spd
  '93 90CS UnQ