clutch losing pressure ?
#1
12-13-2008, 07:57 PM
Join Date: Jun 2006
Location: Stamford
Posts: 601
Rep Power: 46 
clutch losing pressure ?
When car sits for a couple of days pedal engages very low (like loss of pressure ) after driven for a while pedal comes back up.
Any body know whats up?
Any body know whats up?
#4
12-14-2008, 08:12 AM
Join Date: Jun 2006
Location: Stamford
Posts: 601
Rep Power: 46 Accumulator sounds right and I'm going to change it .What would be symptom of a bad slave?
Elliot
#5
12-14-2008, 09:35 AM
I've seen the accumulator replaced probably 20 to 1 in this application.
#7
12-14-2008, 11:25 AM
Registered User
Join Date: Oct 2007
Location: Elk Grove, CA
Age: 83
Posts: 961
Rep Power: 87 
Ard....youre confusing Spartacus....check which book you're using for reference. You've got the history book, not the service manual.
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#9
12-14-2008, 07:39 PM
Elliot,
I had a master cylinder leak at some point (just a tiny leak, couldn't even see it) and the pedal would go down 3/4 of the way to the floor by morning. If I pumped the pedal, it would build pressure and after about 20-50 pumps, it would have full pressure for the day. If it sat for a prolonged amount of time, say 6 hours, it would begin to lose pressure again and overnight, it would lose all the pressure.
I had a master cylinder leak at some point (just a tiny leak, couldn't even see it) and the pedal would go down 3/4 of the way to the floor by morning. If I pumped the pedal, it would build pressure and after about 20-50 pumps, it would have full pressure for the day. If it sat for a prolonged amount of time, say 6 hours, it would begin to lose pressure again and overnight, it would lose all the pressure.
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991.2 GT3 RS Weissach Racing Yellow
991.2 Turbo S GT Silver
991.2 GT3 Chalk (Manual)
2022 Cayenne White
former 1972 911T white, 1984 911 3.2 Targa black, 993 cab white, 993TT arena red, 993TT silver, 996TT speed yellow, 991.1 GT3 white
www.speedtechexhausts.com
info@speedtechexhausts.com
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#11
12-14-2008, 09:19 PM
Elliot,
It's up in the footwell area attached to the clutch pedal at the top. It's a little miniature hydraulic cylinder about 6" in length. I did not replace it myself, but I watched the replacement process. It took about 1/2 hour to remove, replace and bleed the lines. I was told that if even a tiny bubble gets in the system from a leak, it will cause the problem and you may not even see any fluid. I don't think we saw any fluid, my tech just did it based on experience with failed master cylinders and he was right. He may have had to go in from the bonnet firewall side too, I forget.
It's up in the footwell area attached to the clutch pedal at the top. It's a little miniature hydraulic cylinder about 6" in length. I did not replace it myself, but I watched the replacement process. It took about 1/2 hour to remove, replace and bleed the lines. I was told that if even a tiny bubble gets in the system from a leak, it will cause the problem and you may not even see any fluid. I don't think we saw any fluid, my tech just did it based on experience with failed master cylinders and he was right. He may have had to go in from the bonnet firewall side too, I forget.
__________________
991.2 GT3 RS Weissach Racing Yellow
991.2 Turbo S GT Silver
991.2 GT3 Chalk (Manual)
2022 Cayenne White
former 1972 911T white, 1984 911 3.2 Targa black, 993 cab white, 993TT arena red, 993TT silver, 996TT speed yellow, 991.1 GT3 white
www.speedtechexhausts.com
info@speedtechexhausts.com
Testimonials facebook SpeedTech Exhaust Videos
991.2 GT3 RS Weissach Racing Yellow
991.2 Turbo S GT Silver
991.2 GT3 Chalk (Manual)
2022 Cayenne White
former 1972 911T white, 1984 911 3.2 Targa black, 993 cab white, 993TT arena red, 993TT silver, 996TT speed yellow, 991.1 GT3 white
www.speedtechexhausts.com
info@speedtechexhausts.com
Testimonials facebook SpeedTech Exhaust Videos
Last edited by John@SpeedTech; 12-14-2008 at 09:21 PM.
#12
12-15-2008, 07:25 AM
Join Date: Jun 2006
Location: Stamford
Posts: 601
Rep Power: 46 Elliot,
It's up in the footwell area attached to the clutch pedal at the top. It's a little miniature hydraulic cylinder about 6" in length. I did not replace it myself, but I watched the replacement process. It took about 1/2 hour to remove, replace and bleed the lines. I was told that if even a tiny bubble gets in the system from a leak, it will cause the problem and you may not even see any fluid. I don't think we saw any fluid, my tech just did it based on experience with failed master cylinders and he was right. He may have had to go in from the bonnet firewall side too, I forget.
It's up in the footwell area attached to the clutch pedal at the top. It's a little miniature hydraulic cylinder about 6" in length. I did not replace it myself, but I watched the replacement process. It took about 1/2 hour to remove, replace and bleed the lines. I was told that if even a tiny bubble gets in the system from a leak, it will cause the problem and you may not even see any fluid. I don't think we saw any fluid, my tech just did it based on experience with failed master cylinders and he was right. He may have had to go in from the bonnet firewall side too, I forget.
Thanks John,
Elllot
Last edited by Turbohead; 12-15-2008 at 07:27 AM.
#13
12-15-2008, 10:34 AM
Registered User
Join Date: Jan 2006
Location: stuttgart, germany
Age: 59
Posts: 128
Rep Power: 24
The accumulator is only a tank, unless it gets a pin hole all you need is a o-ring around the neck of the accumulator size of a dime. Porsche is making a killing on these.
#15
12-15-2008, 11:35 AM
Registered User
Join Date: Jan 2006
Location: stuttgart, germany
Age: 59
Posts: 128
Rep Power: 24
Hey JJbravo thanx for the pix of accumulator. Yes, sometimes it's just the o-ring especially if there has been recent work. I was just giving another alternative prognosis. This set up really is not needed for persons who track their cars, go with the GT2 set up is simpler. And when the car is running tank gets pressurized even when failed it's for pressure before car is started or sitting.