Hi all,
I have a 90 rs with no fluid to the rear wheels. I replaced both wheel cyls. and lines to them. I also replaced the master cyl.. When we bleed the rear, the pedal don't move at all. and we have all kinda pressure at the front, in fact the front wheels were locked up solid. I went to replace the combo valve only to find out that they were discontinued (dealer). I was reading online about a tool that you need to push in a piston on the firewall end of the valve? Can anyone elaborate on the proper procedure to to bleed them with this tool? Any help would be great! Thanks
Kevin

 

are you talking about bench bleeding the master cylinder? anything will work, no special tool needed. I usually use a screwdriver handle or a brass drift.

or are you talking about the prop valve? there is no reason to compress or push anything internally. Just bleed it. What are you trying to do? rebuild it? is it missing parts, damaged or ???

as for the rear, have you checked the rear flex hose from the axle to the rear? they tend to deteriorate internally and block fluid.