Re: Another bleeding rear brakes issue
Yes, you should use a disc/disc combination valve. The disc/drum combination valve has a metering valve for rear drums and with the rear discs you don't need the rear metering. Also, you stated you are using a disc/drum MC. The disc/drum MC normally has a residual pressure valve in the outlet port for the rear drums whereas a MC for disc/disc will not have the residual pressure valve. I'm not sure that either of these two changes will fix the problem with inability to bleed the rear discs, but may help avoid other braking issues. Are you sure you bled the MC properly? If you have a big air bubble in there you won't be able to bleed the brakes properly. The old school way is ok, but I prefer to use the Motive power bleeder. It doesn't cost a lot and makes it a one man procedure.
'69 Z/28, Lemans Blue/White Stripes, DZ302, Tremec Magnum, 4.10, Procar Elite Seats,
Custom Upholstery, Dynatech headers, 17" VWW V45's, 235/45, 275/40, C5 Front Brakes