Grisley1958
Well-Known Member
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I wonder if it's from the brake fluid. That stuff gets nasty when it gets oldOnce a long few years back I had done a front brake job for a guy and replaced his calipers. I had the curious cat moment and popped the piston from the caliper. You’d never imagine how much muddy crud was behind the piston!
I don’t know how a brake system gets all that crap in there but they do get nasty!!