How likely..clutch slave again or MC
Thread Starter
AutoX
Joined: May 2014
Posts: 12
Likes: 0
How likely..clutch slave again or MC
Car: '06 Carrera 997.1, 28k miles
So I recently (<2k miles ago) did a clutch job in my 997.1, Spec Stg 2 and new (oem, from dealer) slave. Bled everything with new dot 4 fluid.
Everything was great for a while then, suddenly the other day the following issues popped up:
- Mushy clutch pedal
- Travel is super short to full engagement, and it's all at the bottom of the clutch pedal travel.
- Sometimes the pedal gets stuck to the floor and I have to pull it up.
- Can "feel" a pulsing when I push lightly on the pedal.
- Difficult to get it in most gears when running, no issue with it not running.
- There is no slippage when the clutch is engaged while driving, so no noticeable issues there.
I did bleed it a few times, and it would be good initially then quickly go back to the issue. The slave on the outside looks ok, but the ability to inspect it is limited. I checked the clutch pedal mc and didn't see any seepage. Under the car was dry, no fluid leaks.
It feels like something is leaking, clearly..Question is, how likely is it that it is yet again the slave or should I be looking at the clutch master cylinder?
Appreciate any and all insight!
So I recently (<2k miles ago) did a clutch job in my 997.1, Spec Stg 2 and new (oem, from dealer) slave. Bled everything with new dot 4 fluid.
Everything was great for a while then, suddenly the other day the following issues popped up:
- Mushy clutch pedal
- Travel is super short to full engagement, and it's all at the bottom of the clutch pedal travel.
- Sometimes the pedal gets stuck to the floor and I have to pull it up.
- Can "feel" a pulsing when I push lightly on the pedal.
- Difficult to get it in most gears when running, no issue with it not running.
- There is no slippage when the clutch is engaged while driving, so no noticeable issues there.
I did bleed it a few times, and it would be good initially then quickly go back to the issue. The slave on the outside looks ok, but the ability to inspect it is limited. I checked the clutch pedal mc and didn't see any seepage. Under the car was dry, no fluid leaks.
It feels like something is leaking, clearly..Question is, how likely is it that it is yet again the slave or should I be looking at the clutch master cylinder?
Appreciate any and all insight!
Burning Brakes
Joined: Jan 2011
Posts: 965
Likes: 89
From: Near Charlotte NC
I can only talk from my experience which is the replacement of clutch and slave on a 2000 Boxster S when I did my IMS bearing in my garage. It sure sounds like the slave is not right. I would say not seated right but that wouldn't explain it working partially again after you re-bleed. After you initially bleed it do ALL the issues go away? I have to assuming you are also bleeding it correctly. If all problems do go away then yeah it sounds like fluid, but where is it going, dang. Again I've only done this full job once, hoping others can help you out. Sounds frustrating.
Oh and I have to assume you replaced your clutch for the enjoyment of the spec one? That car is almost new, old one shouldn't be warn. I could see the slave maybe wearing out with those low miles depending on driving conditions.
Oh and I have to assume you replaced your clutch for the enjoyment of the spec one? That car is almost new, old one shouldn't be warn. I could see the slave maybe wearing out with those low miles depending on driving conditions.
Three Wheelin'
Joined: Feb 2017
Posts: 1,965
Likes: 691
From: San Francisco
Sorry to hear about that. I just replaced my clutch at 51k due to a broken pressure plate finger. I replaced the slave prior to that trying to debug the problem. The rubber piston sleeve had cracked, which is a common problem, but that wasn’t the root of the problem. (This won’t affect the operation but adds a bit more vibration into the pedal from the metal piston riding on the metal release arm.)
The symptoms you are describing are odd. If it was just a stuck pedal and would likely say helper spring. If it was just the vibration when partially depressed I would say pressure plate or broken piston sleeve. If it was just the mushy pedal I would say Bad slave or needs to be bleed again.
I would likely replace the slave and go from there. It’s only a $150 part.
Keep us posted. It would suck to have to pull the transmission so soon.
The symptoms you are describing are odd. If it was just a stuck pedal and would likely say helper spring. If it was just the vibration when partially depressed I would say pressure plate or broken piston sleeve. If it was just the mushy pedal I would say Bad slave or needs to be bleed again.
I would likely replace the slave and go from there. It’s only a $150 part.
Keep us posted. It would suck to have to pull the transmission so soon.
RL Community Team
Rennlist Member
Rennlist Member
Joined: Oct 2007
Posts: 28,601
Likes: 8,393
From: Clemson, SC
How do you like the spec clutch feel compared to the stock one, specifically on engagement?
I have one of their setups in my supercharged 928 and its awful. It's grabby and judders on engagement and all the other clutch parts are brand new - intermediate plate, pressure plate, flywheel, etc and its not a big grip upgrade one either where you'd expect some of this in exchange for clamping force or gripping power.
Your problem sounds like the slave.
I have one of their setups in my supercharged 928 and its awful. It's grabby and judders on engagement and all the other clutch parts are brand new - intermediate plate, pressure plate, flywheel, etc and its not a big grip upgrade one either where you'd expect some of this in exchange for clamping force or gripping power.
Your problem sounds like the slave.
Thread Starter
AutoX
Joined: May 2014
Posts: 12
Likes: 0
After you initially bleed it do ALL the issues go away? I have to assuming you are also bleeding it correctly. If all problems do go away then yeah it sounds like fluid, but where is it going, dang. Again I've only done this full job once, hoping others can help you out. Sounds frustrating.
Oh and I have to assume you replaced your clutch for the enjoyment of the spec one? That car is almost new, old one shouldn't be warn. I could see the slave maybe wearing out with those low miles depending on driving conditions.
Oh and I have to assume you replaced your clutch for the enjoyment of the spec one? That car is almost new, old one shouldn't be warn. I could see the slave maybe wearing out with those low miles depending on driving conditions.
The symptoms you are describing are odd. If it was just a stuck pedal and would likely say helper spring. If it was just the vibration when partially depressed I would say pressure plate or broken piston sleeve. If it was just the mushy pedal I would say Bad slave or needs to be bleed again.
I would likely replace the slave and go from there. It’s only a $150 part.
Keep us posted. It would suck to have to pull the transmission so soon.
I would likely replace the slave and go from there. It’s only a $150 part.
Keep us posted. It would suck to have to pull the transmission so soon.
How do you like the spec clutch feel compared to the stock one, specifically on engagement?
I have one of their setups in my supercharged 928 and its awful. It's grabby and judders on engagement and all the other clutch parts are brand new - intermediate plate, pressure plate, flywheel, etc and its not a big grip upgrade one either where you'd expect some of this in exchange for clamping force or gripping power.
Your problem sounds like the slave.
I have one of their setups in my supercharged 928 and its awful. It's grabby and judders on engagement and all the other clutch parts are brand new - intermediate plate, pressure plate, flywheel, etc and its not a big grip upgrade one either where you'd expect some of this in exchange for clamping force or gripping power.
Your problem sounds like the slave.
Agreed it sounds slave-related, but this thread gives me the idea it could be MC related: https://rennlist.com/forums/997-foru...-cylinder.html although I believe he did end up replacing the slave in another thread.
I'll just have to dig in and see what I can figure out. Appreciate the tips everyone. I'll keep you posted on the struggle!
Three Wheelin'
Joined: Feb 2017
Posts: 1,965
Likes: 691
From: San Francisco
Good luck replacing the slave. It only took my Indy 1hr to replace it but that was under ideal circumstances with somebody had replaced a ton of them. If you dont have a lift I think it’s likely false economy as a diy, unless you really want to. It’s hard to get it back in with your hand over your head working in the blind.
Thread Starter
AutoX
Joined: May 2014
Posts: 12
Likes: 0
Good luck replacing the slave. It only took my Indy 1hr to replace it but that was under ideal circumstances with somebody had replaced a ton of them. If you dont have a lift I think it’s likely false economy as a diy, unless you really want to. It’s hard to get it back in with your hand over your head working in the blind.
Thanks in advance!
Trending Topics
Rennlist Stories
The Best Porsche Posts for Porsche Enthusiasts
9 Features and Characteristics That Only Porsche People Understand
Verdad Gallardo
I've Written 500 Rennlist Articles: Here's How Porsche Has Changed Along the Way
Joe Kucinski
10 Most Unnecessary Porsches Ever Built (And Why We Love Them)
Verdad Gallardo
Porsche 911 GT3 S/C vs 718 Spyder RS: 10 Categories, One Winner
Joe Kucinski
This Builder Is Turning Heads With Its Slantnose 911 Creation
Verdad Gallardo
Porsche 911 GT3 Artisan Edition Pays Homage to Japanese Culture
Verdad Gallardo
Porsche Reveals Coupe Variant of the Electric Cayenne With a Fresh Look
Verdad Gallardo
10 Porsche Colors That Have More Personality Than Most People
Verdad Gallardo
Guntherwerks' Final Speedster Creation Is the Ultimate Porsche Restomod
Verdad Gallardo
Three Wheelin'
Joined: Feb 2017
Posts: 1,965
Likes: 691
From: San Francisco
Rob is is the owner. He’s an ex-racer with a 750hp turbo 993 and a 997 GT2 parked out front. Pat and Wells are rockstar Porsche mechanics.
If you swing up this way let me know. Couple guys in Marin always looking for an excuse for a quick rip to the coast.
Thread Starter
AutoX
Joined: May 2014
Posts: 12
Likes: 0
Update: Put a new slave cylinder in it..no change. Well, it can't be my 1500mi clutch, so new clutch master cylinder...no change. It can't be my 1500mi clutch, gotta be a bubble? Flushed a dozen times, manually and with pressure bleeder, 2 full bottles of brake fluid, no bubbles..no change.
I'm out of cheap options, and need to admit it's my less-than-1500-mile clutch, or my 28k mile flywheel which looked great when I had the clutch out or something..Any which way, it has to come apart.
Currently debating "investing" in a Quickjack/similar and taking the pain or dropping it off at a shop and taking the bigger financial pain. I'm not one for giving up, and if I do it solo at least I have a fixed car and Quickjack in the end of it, albeit a lot more frustration. On the other hand, it would be nice to "easy-mode" this and have someone do it, even if it costs more.
Opinions? I feel like I need to pick a direction, none appealing. Thanks in advance for any feedback.
I'm out of cheap options, and need to admit it's my less-than-1500-mile clutch, or my 28k mile flywheel which looked great when I had the clutch out or something..Any which way, it has to come apart.
Currently debating "investing" in a Quickjack/similar and taking the pain or dropping it off at a shop and taking the bigger financial pain. I'm not one for giving up, and if I do it solo at least I have a fixed car and Quickjack in the end of it, albeit a lot more frustration. On the other hand, it would be nice to "easy-mode" this and have someone do it, even if it costs more.
Opinions? I feel like I need to pick a direction, none appealing. Thanks in advance for any feedback.
Advanced
Joined: Jan 2015
Posts: 71
Likes: 4
Do bubbles come back after bleeding and after you’ve tried the clutch? I feel your pain, I chose plain B and paid through the nose. I didn’t want to do the master cylinder and I botched the bolts on the slave so the Indy got me out of more pain and was worth the dough. I vote plan A, you will use it again.
