Six_Shooter Posted May 25, 2012 Share Posted May 25, 2012 I have a 1" Z31 Brake master cylinder, that I would like to use on S30, I had it on there once, but didn't work as I had wanted it to, so I am using the original 7/8" master currently. What I would like to do is bypass the proportioning valve that is built into the master cylinder. I have an external adjustable proportioning valve that I want to use instead. When I removed the glued on cap to try and remove the prop valve, I was greeted with what looks like a nut that has two holes, so no standard tools here. I tried making a tool out of some metal doweling a 6.5 diesel pushrod, but the doweling is too soft and just bends. A friend of mine and I tried using some punches, clamped together, and twisting them did not release this plug. Is it a left handed thread? Any other ideas for a tool to remove this plug? Quote Link to comment Share on other sites More sharing options...
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