Clutch Pedal Stuck To Floor, Cannot Change Gears With Clutch

[MBar93]

Hi everyone

I recently bought an r33 skyline gtst, been loving it up until now. I was driving and suddenly I tried to change gears and the pedal stuck to the floor, and the clutch wouldn't disengage and I had to drive home without using the clutch pedal, resulting in a lot of grinding gears and struggling to get moving at traffic lights.

I was thinking it might be something to do with the slave cylinder... anybody have any info? Has anybody else had this problem?

Edited November 22, 2014 by MBar93

[GTR_JOEY]

Is there fluid in the master cylinder?

[MBar93]

Is there fluid in the master cylinder?

EDIT: I was wrong, it's actually full

I apologise for sounding pretty dumb, I've never had issues with clutches or hydraulic lines and cylinders with previous cars so I know next to nothing about that stuff haha

Edited November 22, 2014 by MBar93

[scotty nm35]

It most likely just needs a bleed, but that means the slave cylinder is probably rusted up internally.

[MBar93]

Okay so I changed the slave cylinder and bled the system... still no pressure in the clutch pedal. Any other suggestions?

[Hadouken]

Do you get pressure in the clutch if you pump it?

[MBar93]

Do you get pressure in the clutch if you pump it?

Nope, no pressure even when I pump it

[Hadouken]

Any leaks?

[MBar93]

Any leaks?

Pretty sure there's no leaks, we checked all the lines, and there's no fluid anywhere it shoudn't be

[scotty nm35]

The master cylinder may need to be adjusted for it's home position, but bleeding clutches without the Vac bleeder is very hit and miss from my experience.

[blind_elk]

Don't know if its a problem in the 33s, but 32s are prone to the welds on the pedal box breaking.

[jiffo]

So it was working OK, fluid level is correct and now it's not working.

No fluid leaks on the concrete.

Push type clutch?

Unless you've destroyed the pressure plate, it has to be either master cylinder, broken pedal, broken throw out lever or perhaps pivot ball.

The broken bits are easy items to check.

The return spring arrangement on the Skyline goes over-centre at about half pedal, thus your pedal stays on the floor if there's a hydraulic problem.

I don't waste time on brake/clutch hydraulics, simply buy a new master cylinder.

[MBar93]

So it was working OK, fluid level is correct and now it's not working.

No fluid leaks on the concrete.

Push type clutch?

Unless you've destroyed the pressure plate, it has to be either master cylinder, broken pedal, broken throw out lever or perhaps pivot ball.

The broken bits are easy items to check.

The return spring arrangement on the Skyline goes over-centre at about half pedal, thus your pedal stays on the floor if there's a hydraulic problem.

I don't waste time on brake/clutch hydraulics, simply buy a new master cylinder.

How would I have destroyed the pressure plate? And how would I be able to tell if that is the problem? I'm hoping it's just the master cylinder, I'll get a new one and hope for the best

[m.j.h]

Get someone to work the pedal while you check if the slave cyl is working

If it doesn't move it's the master cyl if it does the problem is in the bell housing somewhere

[MBar93]

So I'm waiting for a new master cylinder to arrive, meanwhile I took the old one out, and with the resevoir still full I pumped it by hand and it made a gurgling noise and very little fluid came out at all. I take it this is a definite sign the master cylinder is the problem?

[MBar93]

I've swapped in the new master cylinder, and tried to bleed the system. There is a little pressure back in the clutch pedal, but I can't seem to get any more back. Is it just a case of there still being air in the system, and more bleeding required?

[Hadouken]

If you have some pressure, then bleed more son. if bubbles keep coming the keep bleeding

[m.j.h]

Are you bleeding at the slave cyl or the master cyl?

Try cackling the outlet pipe of the master cyl and see if air comes out from there

[MBar93]

Are you bleeding at the slave cyl or the master cyl?

Try cackling the outlet pipe of the master cyl and see if air comes out from there

I've bled both. Only started to get a little bit of pressure after bleeding the master cylinder. I'll try the outlet pipe

If you have some pressure, then bleed more son. if bubbles keep coming the keep bleeding

There were no more bubbles coming out, just liquid...

[scotty nm35]

Buy a cheap vac bleeder, you will thank me later.