ive just fitted up some new copper pipes with goodridge hoses. poured fresh fluid into the system as the old one was completely empty due to the pipes cut. followed the normal procedure bleeding the brakes, starting with pumping the pedal until vacuum is destroyed but i keep getting a psssst sound everytime i push the pedal is this normal?
anyway opened the screw on the drivers side rear by half a turn and pumped the pedal a good 50 times but not getting any fluid coming out the rear. what could be the problem?
currently the engine is not installed so the vacuum pipe is disconnected from the manifold.
help please

cheers