Questions, replacing clutch slave cylinder unsuccessed.

rnln · 09:11 PM

I spent all day to replace my clutch slave cylinder, bled brake and clutch. Bleeding brake calibers were fine. Brake felt good now but clutch doesn't work. Can someone please tell me if there is anything that I missed? Or if the slave is defective? Can someone help please?

In the past, I did many brake and clutch bleeding before but not P car. This time I asked questions, did the search, and read instructions. The method should be fairly simple accept the slave location is tough to get to. At the end of the day I got fluid, dirt everywhere from head to toe.

When I took the slave off, I did stick my finger in the hole to find out what is in there, as someone here suggested. I felt the piston spot. I is like a level with the hole in the middle. I tried to push it but I can't. It is very strong. I only can move it maybe a mm or so. So I feel pretty sure that those ears in there are fine. And yes, my slave was leaking bad. I asked someone to step of the pedal slightly and I got fluid spray all over my face.

After bleeding them all (brake calibers and clutch), I went up and try to put the car in gear. The gear went in fine but the clutch felt funny. For several months, I have the problem of clutch pedal didn't fully return but if I pull it up with my toe, then it will come up fine. Now, it is much harder, as rock, but only on the bottom. From the top to the middle, it felt much less pressure. And I can not put the car is any gear when the engine is running. Turn off the engine, gearing feel fine.

I went down and bled it again. Then I went up and tried it. Still the same. Went down bleed again, and again, again, again, and again. It still the same. At the end of the day, I am so unhappy.

Is there anyone in Scal can come by to give me a diagnostic? I'll get beer.. and anything I can.
Thanks a bunch.

Porsche84 · Porsche84's Garage

I work on a Grand Am race team. I replaced the clutch M/C on a 997 Cup car a few races ago and could not make the clutch work correctly by pump bleeding. I used the pressure bleeder and it pushed out a bunch of air that pumping could not get out. I was convinced that pumping would work, but it didn't. Good luck

rnln · 10-23-2006, 09:49 AM

really? umm...

rnln · 05:58 PM

I took it out today and found that it is ripped apart. The housing is separate from the internal. The piston tip was stuck inside the bell housing. I had to wiggle and pull it hard to get it out. When it came out, yes, the interal is separate from the housing and the boot is rip at the tip.
Can someone tell me why? Anything wrong that I do here? I feel like this is a defective part but the seller said if the part is used, there is no replacement. They only replace if I found this is the wrong part and never install it.
I affraid if I pay for another one and it will be the same.

I compare between the 2, new and old, slave and found that the old slave No. is S6567 while the new one is 6567. Are they diff.?
Also the old one is FAG and several other numbers. The new one is FTE, 1 G.
Does anyone know anything about these?
Thanks

88911coupe · 10-23-2006, 07:39 PM

I did this a while back and I'm guessing that possibly the part at the end of the piston that actually actuates the clutch lever may have been inserted slightly off center and pushed past the clutch lever and torn itself up. It's critical that they line up properly before depressing the clutch. I'm assuming it looked fine before installation...correct? You definitely need a pressure bleeder. Those that have tried the "normal" bleeding method say it really does not work.
Good Luck

rcwaldo · 10-23-2006, 09:47 PM

The plunger must seat in the ball of the t/o fork. It is possible to get this misaligned while wrestling the thing into place while getting a nut started.

rnln · 10-23-2006, 11:01 PM

88911coupe,
I know that the slave rod was in the right spot because I was careful when I installed it and also when I took it off, the rod was stuck in the hole. I had to pull hard while wiggling to get it out. I am not sure if that is good or bad.

rcwaldo,
so what you are saying is the same as 88911coupe did then. umm.. 2 people think of the same thing then that might be the problem. I think I will put thing together and try it again. A new question come up...

Does anyone know a way to secure the circlip safe in place so that it won't pop again?

Thanks.

Porsche84 · Porsche84's Garage

By the way, Porsche recommended replacing the 87-89 slave cylinder with the one from the 90 -95. I think I have the technical bulletin around somewhere, I'll look for it. I think it had somethind to do with reducing the rattling noise from the tranny.

rnln · 10-25-2006, 10:23 PM

Yuo guys are correct. Thank you very much. I always thought that there was no way for it to mis-aligned since I was carefully. But I wasn't carefully enough. After many response of mis-aligned thought from yuo guys, I thought about it carefully and be very careful when I reinstalled it, after re-packed everything. It is sooooo easy to mis-align it. It is soooo easy for the piston to slip out of the hole and slide to the top edge.
Finally, I got it in and bled. The clutch works fine now. I know it won't last as long since the boot is ripped and the internal piston has been in and out several times.
Thank you all.