sinking brakes

[Ralph245]

I have a 83 245 that I just replaced the rear calipers on. After pressure bleeding I checked brakes and pedal went to floor. So next after finding no leaks I put in a new master cylinder but still pedal goes to floor.
I can find no information about this.

[93Regina]

83 245

See last post here: 1982 240 brake bleed procedure

Pressure bleeding should get the job done, but I use vacuum to suck out fluid.

If pressure bleeding, I make sure the drain hose goes upward, so I can see what is coming out.