I believe it's a scratch from something, not a crack.
Almost got it back together with new brake pads, hoses, and when I went to test the bleeders, the passenger one broke off.
Cool.
Quick run to O'Reillys to get some EZ Outs and bleeder screws.
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Then the EZ Out chewed up and split the metal that remained sticking out above the surface of the caliper.
Cool cool cool.
Quick run to Home Depot to get longer EZ Outs, a cold chisel, and a torch.
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This little devil just doesn't want to come out. I've exhausted my EZ Outs, ate through much of the fitting and caliper, and my patience.
Cool cool cool, tight tight tight.
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So now I'm going to make a quick run across town to get a caliper. Gotta get this tank back together tonight to get to work tomorrow.