I have a 2009 Nismo 370Z with 48000 miles on it. Recently clutch start to slip, so I replace with new ACT street performance clutch kit. Fly wheels not replace. At same time I change to Zspeed CSC. I did not change the master cylinder first time, after install I get no pressure from clutch. So I installed a used master cylinder just to hold it. It works on test drive, then fail again. There it no oil lost. They did bleed the air out. Anyone had this problem. I'll try to get a new master cylinder first.
