[s-cars] Rear brake caliper sticking

[Rich Assarabowski]

  I'm having trouble with one of the rear brake calipers sticking, it 
works fine when cold, after a couple of hard stops it doesn't release all the 
way.  Once it cools down completely it's OK again.  It's already been 
replaced once a couple of years ago with a rebuild.  I lubricate the hand brake 
cam regularly, in fact it was lubed just a couple of months ago when new 
hand brake cables were installed.  So my suspicion is that it's the piston
sticking.

I guess it's time to put in another rebuilt caliper, anyone have a 
source for high quality rebuilds?  My feeling is most places just clean up 
calipers and pop in a new piston seal, without rehoning the cylinders, measuring 
for tolerances, etc.   I don't want to keep doing this over and over...   
Or bite the bullet and put in a new one? 

-- Rich A.
   '92 & '93 S4