Yeh bleed them ALOT!! it make take 1/4 quart to bleed just one of the rear lines out. Had the same problem when I recently replaced my brakes. I bleed the lines b/c the fluid was black. Ne way I had to go back though and bleed them all a 2nd time. I use a pump to vacuum out the fluid. You just have pump out alot of fluid it takes a while.