clutch master cylinder overheating, or going bad?

[msupra1]

I have a 700bhp single 2jz-gte.. the cars been running quite flawlessly this year with no issues. I ran into my first real issue and its with my clutch.

 

I was driving one day, and then when I was taking off from stop lights I noticed the clutch felt very weird.

 

It was engaging at the very bottom, and instantly. I usually can smell the clutch burning after take off, since I have to slip it quite a bit because engagement is so instant.

And sometimes it will just have a really soft/spongy engagement.

 

I did some hard pulls in 3rd and 4th and it looks like the clutch is holding solid. It's a stage 3 single disc.

 

 

I suspect that it might have something to do with my clutch master cylinder.

Did anyone else experience these kind of issues? I was thinking of flushing it out and putting some DOT 5 fluid in there, see if that helps.

 

cheers

[msupra1]

also forgot to mention, when I let the car cool off fully overnight, the next day I took it for a quick spin and the problem did not go away, engine is cold at that point so it can't be overheating the cylinder?

[P_Bazz]

The rubber rings on the small piston inside the master and slave cilinder will deteriorate over time and cause fluid to seep past them while you hold the clutch pedal down. This gives the spongy feeling, if you have a heavy clutch in particular the chance of this happening increases. I would look at them/replace them as soon as you can because mine started doing that as well and two days later I couldn't get the car in gear anymore because the slave cilinder wasn't holding any pressure.