Is there some magical way to do this or have I got a f*cked up master\ncylinder? Basically I stripped the rear caliper down as it had been\nsticking on. Coming to bleed it no matter how much I pumped the pedal no\njuice was forthcoming. I could hear air suck/blowing as the pedal was\npressed though. So, tracing back to the splitter/switch I noticed another\nbleed nipple on it so I thought I'd try and bleed it from the master cyl\nto there. Opening the valve and pumping saw a small amount of very dirty\nfluid come out but once that was out that was it, the reservoir was full\nof nice clean fresh fluid btw. What had been in there was very dirty.\n\nBefore I started the linked system worked fine so I'm surprised if the\nmaster cyl is indeed knackered.