Got a 98 z24.. ( 2.4 Twin Cam ) .. Installed New Engine / Clutch / Transmission few months ago. .. Sometime( when car is hot, drove for about an hour) i'm havin trouble with my clutch, it grinds.. i have to pump the clutch like 10times before it can shift without grinding.. i try bleeding the clutch like 2 weeks ago ( air came out ) then it worked fine for about a week, now its back.. also, when its grinding.. ill stop the car, open the clutch liquid resevoir, close it again. . start the car, n everethings fine for a while!!.. it also seems to be workin fine when it rains.. im all confused! .. could this be the master or slave cylinder?.. need help real fast, startin college soon.. Lol! , Thanks! -_-

also.. just check my clutch fluid resevoir.. theres black stuff in the bottom of it!. . = / dont know where that came from...

I replaced my master cylinder and all my dreams came true.