06-10-2009, 01:46 AM
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#1
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Registered User
Join Date: Dec 2008
Location: Queensland, Australia
Posts: 1,522
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Squeaking clutch slave cylinder
For the last two months I have noticed that my clutch has a dose of severe squeaking every time I depress the clutch pedal. The noise is coming fron the slave cylinder above the gearbox - I have bled the system (a pita) but to no avail. On previous cars, a squeaking clutch was normally cured by greasing the thrust rod pushing on the clutch actuating arm, but on the Boxster the arm is not visible for lubricating.
Am I missing something or do I have a problem...?
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06-10-2009, 05:45 AM
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#2
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Registered User
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 6,555
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Quote:
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Originally Posted by Steve Tinker
For the last two months I have noticed that my clutch has a dose of severe squeaking every time I depress the clutch pedal. The noise is coming fron the slave cylinder above the gearbox - I have bled the system (a pita) but to no avail. On previous cars, a squeaking clutch was normally cured by greasing the thrust rod pushing on the clutch actuating arm, but on the Boxster the arm is not visible for lubricating.
Am I missing something or do I have a problem...?
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The noise may be coming from the pivot point where the slave contacts the throwout fork. If that is the case, you need to pull the slave and lightly lube the fork end with a small amount of high temp grease (usually made for brake applications). If that does not cure it, the fork may be going, which requires pulling the gearbox to gain access..............
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06-10-2009, 06:29 AM
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#3
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Registered User
Join Date: Aug 2004
Location: Alta Loma, CA
Posts: 1,334
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Pull the slave. One bolt holds it in. The head of the bolt is 13mm. After removing the bolt, use a small prybar just behind the area where you removed the bolt. Pry the slave forward 2-3mm's and pull it towards you and BACK.. it will come out of the tranny. Clean and grease the end of the pushrod. I use brake clean and a high temp BOAT TRAILER wheel bearing grease. The boat grease is designed for extreme temp change and happens to be WATER proof (think: pulling a heavy boat down the freeway and then submerging the trailer into a cold lake) It works well 
I'll snap a picture for you this morning.
B
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Engine Builds, Transmission Builds, Engine Conversions, Suspension Installs, Suspension Tuning, Driver Coaching, Data Acquisition, Video, SCCA/PCA/POC/NASA/GRAND AM/ALMS.
We have worked with amateur and professional drivers for over 26 years. In house machinist, In house fabrication. Our cars, our parts, our engines, our transmission's run nationwide at events every weekend. We work side by side with industry names developing parts.
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06-10-2009, 06:37 AM
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#4
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Registered User
Join Date: Aug 2004
Location: Alta Loma, CA
Posts: 1,334
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The top arrow in this picture is pointing to the "hole" where the slave typically resides
The second arrow is pointing to the BOLT that needs to be removed to get the slave out. I *personally* put that bolt back into the tranny on long term projects. The bolt is only used in ONE place on the car. It is a semi custom length and should not be substituted for any other length bolt!! The bolt does have to come ALL the way out when removing the slave
In a few hours, I'll post a pic of the slave. I leave them hanging from the car when the tranny is out.
B
__________________
Engine Builds, Transmission Builds, Engine Conversions, Suspension Installs, Suspension Tuning, Driver Coaching, Data Acquisition, Video, SCCA/PCA/POC/NASA/GRAND AM/ALMS.
We have worked with amateur and professional drivers for over 26 years. In house machinist, In house fabrication. Our cars, our parts, our engines, our transmission's run nationwide at events every weekend. We work side by side with industry names developing parts.
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06-10-2009, 12:13 PM
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#5
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Registered User
Join Date: Aug 2004
Location: Alta Loma, CA
Posts: 1,334
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Here you go.. not sure if you care or not.. but here it is anyway. I'll post another picture shortly with it out.
B
__________________
Engine Builds, Transmission Builds, Engine Conversions, Suspension Installs, Suspension Tuning, Driver Coaching, Data Acquisition, Video, SCCA/PCA/POC/NASA/GRAND AM/ALMS.
We have worked with amateur and professional drivers for over 26 years. In house machinist, In house fabrication. Our cars, our parts, our engines, our transmission's run nationwide at events every weekend. We work side by side with industry names developing parts.
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06-10-2009, 03:03 PM
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#6
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Registered User
Join Date: Dec 2008
Location: Queensland, Australia
Posts: 1,522
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Many thanks....
Many thanks Brad & JFP, thats just the type of info I was looking for. Your pictures tell all Brad - thankyou.
Now for a great time laying on my back on a cold concrete floor (its winter down here @ 6 deg C). Its not the easiest place to work. Ah bliss.......
Steve
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06-10-2009, 07:00 PM
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#7
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Registered User
Join Date: Apr 2006
Location: Dallas, Tx
Posts: 730
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I also need a clutch slave cylinder (2003 non-S) and see two part numbers for sale online. Anyone know the difference or if one is better than the other?
8E0.721.257B
8E0.721.257M
__________________
2003 Boxster - Sold but not forgotten
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06-11-2009, 08:34 AM
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#8
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Registered User
Join Date: Aug 2004
Location: Alta Loma, CA
Posts: 1,334
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It has been superceded multiple times..
8EO 721 257 M is the one you need. Current retail from Porsche is $84.24
B
__________________
Engine Builds, Transmission Builds, Engine Conversions, Suspension Installs, Suspension Tuning, Driver Coaching, Data Acquisition, Video, SCCA/PCA/POC/NASA/GRAND AM/ALMS.
We have worked with amateur and professional drivers for over 26 years. In house machinist, In house fabrication. Our cars, our parts, our engines, our transmission's run nationwide at events every weekend. We work side by side with industry names developing parts.
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06-11-2009, 08:41 AM
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#9
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Registered User
Join Date: Aug 2004
Location: Alta Loma, CA
Posts: 1,334
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Here is the clutch arm. I'm pulling this car apart right now for an engine swap, but I did the clutch a year or so ago. You can still see the "sticky" stuff I used for grease on the "push" point for the slave.
B
__________________
Engine Builds, Transmission Builds, Engine Conversions, Suspension Installs, Suspension Tuning, Driver Coaching, Data Acquisition, Video, SCCA/PCA/POC/NASA/GRAND AM/ALMS.
We have worked with amateur and professional drivers for over 26 years. In house machinist, In house fabrication. Our cars, our parts, our engines, our transmission's run nationwide at events every weekend. We work side by side with industry names developing parts.
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06-11-2009, 08:43 AM
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#10
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Registered User
Join Date: Aug 2004
Location: Alta Loma, CA
Posts: 1,334
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Quote:
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I also need a clutch slave cylinder
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Tim?
Who diagnosed you needed a slave? I have yet to see one fail (and I have been working on the cars since 97) The *only* time I see an issue? Is then somebody has the slave out for a clutch job and *somebody* gets in the roller chassis and pushes in on the clutch pedal when the slave is NOT attached to the tranny 
B
__________________
Engine Builds, Transmission Builds, Engine Conversions, Suspension Installs, Suspension Tuning, Driver Coaching, Data Acquisition, Video, SCCA/PCA/POC/NASA/GRAND AM/ALMS.
We have worked with amateur and professional drivers for over 26 years. In house machinist, In house fabrication. Our cars, our parts, our engines, our transmission's run nationwide at events every weekend. We work side by side with industry names developing parts.
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06-11-2009, 09:04 AM
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#11
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Registered User
Join Date: Apr 2006
Location: Dallas, Tx
Posts: 730
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Quote:
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Originally Posted by Brad Roberts
Tim? Who diagnosed you needed a slave?
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Thanks for the concern. I completely rounded the bleeding nut during my last flush. Oops! It's a really tight space and obviously I need to find a wrench that gives a better angle. I figure there is no way to replace just the nut?
__________________
2003 Boxster - Sold but not forgotten
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08-11-2009, 10:29 AM
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#12
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Registered User
Join Date: Oct 2008
Location: O.C. CA
Posts: 3,709
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This Squeak is very common on 986 & 996 even when new. Mine always starts when at the track but goes away later
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