Replacing hose... Heat metal end on hose should work to release steel. Don't try to heat the steel part.
Warning... Likely have corrosion on the steel line inside the "nut." You like needs replacement of steel lines.
Rebuild rear is often a waste of time and money. Even if shell is good, piston is not made to be a DIY project. Was not made to be service by GM dealers etc. Bad pistons then junk them.
If you have New pistons and when shell is ok rebuild can work but your shell is very bad condition... You can easily damage the aluminum when trying to clean the mess.
Bore does NOT need a hone etc... because bore make no contact w/ the piston.Damage/corrosion the Seal areas, piston and/or screw, then the seals will leak or won't last.
very easy to happen on screw hole. Just a scratch inside the screw hole can cause a leak. The important seal goes on the screw. washer "seal" just keep water/dirt away from the screw hole.
See my Cave, Rear Brakes
and Brake Service
------------------Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)The Ogre's Fiero Cave
(It's also at the top and bottom of every forum page...)
[This message has been edited by theogre (edited 07-31-2013).]