Evening all,

Was hoping for some insight. Just got the car back from the dealership - I was losing pressure in my clutch pedal after longer drivers (freeway) and whenever I went from 5th to a stop light (without downshifting); pumping it would bring back the pressure in the clutch pedal. They replaced the master slave cylinder. All was well, until just today (one day after) the issue returned; it isn't as bad, but it's definitely the beginning stages of came the last time - pressure comes back immediately after I pump the clutch ONCE. Car is well maintained (bolted on + tune + 4.08 fd ring and pinion). Thoughts? Could it just need a bleed? Slaver cylinder? Thanks all!

Eric

 

Are you running a stainless steel braided clutch line? If not, the stock (rubber) line has a tendency to expand under pressure causing issues that you're describing.

 

I had a the same issue. Replaced the master cylinder. Lost pressure again. It was the concentric slave cylinder. They are weak and inadequate in our car IMO. I have an aftermarket clutch and flywheel and had replaced the original CSC with another OEM one when replacing the clutch. I started losing it again with only about 6K on the new one.

Get the heavy duty CSC from ZSpeed Performance. You'll be happy you did. Much better pedal feel (firm and direct) and the engagement is much better then OEM. No more high abrupt engagement point. Much more linear and easy to feather it. It also has a SS clutch line that comes with it.

Since you have to drop the transmission to replace the CSC, are you going to get a new clutch put in while you're in there? Mine went south at 60K.

 

^whs, the slaves on our cars are anything but adequate once you start adding power mods, it really seems like they were made only to handle ~330 crank HP once u go over then youre better off going with the ZSpeed Slave with new clutch