cvaljakka

Hi ,

This is an update so don’t kill me for talking about this subject, OK ?
After reading the threads about the slave cylinder problem , I was convinced that
This was my problem. I brought my car to the factory in Stuttgart, to change my slave cylinder.
One that has been replaced once before, but the problem came back after
a week… and the garage wanted to replace the whole clutch, he he …
At the factory they de-mounted the units , and told me that there are no problems with this.
They want to open the clutch to see what the problem is at the next service.

The problem has almost gone a way since I changed my driving style. I change gears at a much higher
Revs than I used to do. I am I city driver during the weeks there are not a lot of sprints to be made in a
traffic jam and only use the car hard during the weekend. But when ever I do use the car hard it seems to
run very well.

Does this make any sense ?

Take care ,

Robin 993DX

What were the symptoms of your original problems?

cvaljakka

When you depress the clutch pedal it feels and sounds like there is a need for lubricating a steel wire, and the movement is not swift, but it is a hydraulic system, right. When the car has rested for 24 hrs, it is normally ok for the first 10 mins, and then the symptoms comes back, as described above. It is worse when the outside temperature is high.

Any thoughts ?

Robin 993DX

From the description of your symptoms I am 99% sure it is the clutch slave cylinder.

cvaljakka

Hi Robin,

Thanks for your thoughts, much appreciated. As previously stated, the problem is barley noticeable any more, after I started to change gears at 4 to 6000 rpms (more frequently). Strange is it not. What would you do. I think that am continuing to drive, if they pick it up during service in Zuffenhausen, Stuttgart , OK , if not, well what can I say .

Best Regards,
Chris.

Ben in Plano, TX

cvaljakka,

I have a similar 'squeek' sound when I depress my clutch. I was concerned that it was the slave cylinder but upon conferring with my mechanic (whom I trust a great deal - he is mechanic and driver of a 993 race car) I learned the following.

The throw out bearing on the 993 manual transmission is plastic and is the source of the squeek I'm hearing. It is a common 'problem' on 993's and is no need for concern. It's really not a problem - just a sound the car makes. I'm a bit concerned that if I can hear a squeek that means something's not lubricated and will wear out faster. But other than the sound I have no odd clutch pedal sticking or any other manifestation of a problem.

I brought it up with my mechanic again recently and he said he thought he'd seen a bulletin about an approved lubrication for the bearing that might help. Previously, the factory did not recommend lubrication at all - not sure why.

This may not be what you're hearing but it's such a faint sound that shifting at higher rpm's would likely obscure it due to engine noise.

I'm not worried about it, myself.

Ben <img src="graemlins/wave.gif" border="0" alt="[byebye]" />

Robin 993DX

Ben,

I think the squeak sound he was referring to is different from yours. Under normal no fault operating condition they do make a slight squeak noise, sounds like the squeak you were mentioning. The squeak (metal scraping) sound we exepreienced along with the scrachy feeling at the clutch pedal when depressed is caused by a defective clutch slave cylinder. The kep here is that you can feel the squeak through the clutch pedal.

H20NOO

Ben,

Mine squeeks as well. Oddly, it never did it until the first time the car was driven in the rain at ~9,000 miles. It hasn't stopped since and I now have ~17,500 miles on the car.

Minor annoyance but I looked for something to lube and couldn't get it to stop.

Matt

Ben in Plano, TX

Ah,

Thanks Robin - that clarifies it for me (but may not help our frend cv....). I've never felt anything in the pedal - just heard the squeak. Now my piece of mind is complete.

Now if I can just find out what is rattling in the exhaust system at idle! I thought it was the exhaust tip but tightening that didn't solve the problem. Maybe the heat shield is a bit loose.

Ben

E. J. - 993 Alumni

Thats good info Ben. I replaced my slave cylinder about a year ago and I still have a squeak when I depress the pedal. Of course I cannot feel anything in the pedal as Robin describes it, so I think I am safe.

E. J.

Randall G.

For as long as I can remember (at least 6 years), my clutch has been making a squeaking sound from beneath the car, near the transmission, where the slave cylinder is. I can only hear this squeak with the engine off. I don't have a notchy clutch pedal or shifting problems.

Assuming there are no other problems/symptoms, I think there's absolutely nothing to worry about.

<img src="graemlins/beerchug.gif" border="0" alt="[cheers]" />

Randall G.

Just came back from listening, and it can be better described as a clicking (or maybe stretching) sound. If I operate the clutch pedal quickly, I hear one or two clicks. If I operate the clutch pedal slowly, I hear multiple clicks as the pedal is operated.

Mark in Hermosa

Randall:


That was the same with me. I went thru 4 slave cylinders in 15 months (this is my friday & weekend car). The last one has been fine for a bit. Beats me.

Ben:

I had an Audi 15 years ago that also had a plastic throw out bearing. It went bad and was a much different noise/problem. I don't think they are related. If my current s.c. goes, I'll take a look at the throw out bearing, though.

Has anyone else had this many prob's with the slave cylinder?

Randall G.

Hi Mark,

Did you replace your slave cylinder so many times because your pedal was notchy, or some other problem? Or, just to try to get rid of the click/stretching sound?

My slave cylinder has only been replaced once, back in '94, when the car had some 40k miles. Even then, I didn't replace it because I had a notchy pedal. I didn't like the way the car was shifting .... I've since learned it was just normal aging of the gear synchros.

cvaljakka

Thank you for your thoughts gentlemen.