Clutch Question - Not coming back up?
Thread Starter
Melting Slicks
Joined: Dec 2002
Posts: 2,480
Likes: 62
From: Middletown DE
Clutch Question - Not coming back up?
After heavy acceleration the clutch will not come back up all the way - I have heard many people speak on this but i do not recall seeing an actual "fix".
The Stealer said they have run into this problem before and stated they knew what it was.
I just got my car back from the stealer, they replaced the master and slave cylinders and i took the car out for a run and the problem still exists???
Is there something i can reference them twards? I already mentioned about wrapping the lines with some type of heat resistant wrap but they just looked at my funny.
Thanks!
The Stealer said they have run into this problem before and stated they knew what it was.
I just got my car back from the stealer, they replaced the master and slave cylinders and i took the car out for a run and the problem still exists???
Is there something i can reference them twards? I already mentioned about wrapping the lines with some type of heat resistant wrap but they just looked at my funny.
Thanks!
Melting Slicks
Joined: May 2003
Posts: 2,851
Likes: 1
From: San Bruno Ca
Re: Clutch Question - Not coming back up? (99firetruck)
I have recently heard about a problem very similar to yours. The owner of the COrvette in San Jose CA. clinic told me that the brake fluid used for the clutch tends to "wax" after hard use. This has resulted in a total overhaul of his hydraulic system for the clutch. He told me to switch to a brand of fluid called "Super Blue Racing" from Germany. I just checked my clutch slave cylinder and noticed a ring of "waxing" fluid inside. I am going to change the fluid the first chance I get. I thought he was giving me a line of BS to sell me some exspensive fluid. It sells for approx. 18 dollars a qt. I purchased a qt. and will change it the first chance I get.
good luck
good luck
Thread Starter
Melting Slicks
Joined: Dec 2002
Posts: 2,480
Likes: 62
From: Middletown DE
Re: Clutch Question - Not coming back up? (Scubanme)
I have heard similar to this. My concern is since they replaced the master and slave cylinders (so they say), they would have to flush the system (i think)..... So in theory - it is still happening with Brand New Fluid.
Drifting
Joined: Jul 2002
Posts: 1,329
Likes: 8
From: Corpus Christi Tx.
Re: Clutch Question - Not coming back up? (99firetruck)
Would be very interested in finding out the cause. I have had this problem with my 2000 vette for months, have made numerous trips to the dealer, his only answer was that I had air in the lines. They bled the system but that did not resolve it. Continues to happen under had acceleration
:confused:
:confused:
Le Mans Master
Joined: Aug 2002
Posts: 8,472
Likes: 38
From: Houston TX
St. Jude Donor '11
Re: Clutch Question - Not coming back up? (99firetruck)
I have always heard that this issue is due to flaws in the pre-'02 slave and/or master. Certainly they would have used the updated parts when they did the work so I'm pretty suprised that the issue is still there.
Drifting
Joined: Jul 2002
Posts: 1,320
Likes: 0
From: Duncanville Texas
Re: Clutch Question - Not coming back up? (5 Liter Eater)
Everyone has there own theory. Thruth is there is a service bulletin out for it now and it can be resolved under warranty, etc.
I had mine done and I have not had a problem since. The wax theory is the first time I heard that, but usually most people update to the 02 slave and master.
It is a combination of things. Some will say it is a restriction in the lines, but people modify their lines and still have the problem.
All in all the almost sure fire way to fix the problem is by updating your master and slave to the new 2002+ (it should be the same for z06 and for normal c5's)
Also c4c5specialist had a post sometime ago (do a search) about this problem and what GM was doing to address it. Because of his help I had mine fixed under warranty. If you are out of warranty you may want to change your clutch at the time they replace this stuff, because it requires the same labor!!!!!
I had mine done and I have not had a problem since. The wax theory is the first time I heard that, but usually most people update to the 02 slave and master.
It is a combination of things. Some will say it is a restriction in the lines, but people modify their lines and still have the problem.
All in all the almost sure fire way to fix the problem is by updating your master and slave to the new 2002+ (it should be the same for z06 and for normal c5's)
Also c4c5specialist had a post sometime ago (do a search) about this problem and what GM was doing to address it. Because of his help I had mine fixed under warranty. If you are out of warranty you may want to change your clutch at the time they replace this stuff, because it requires the same labor!!!!!
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Drifting
Joined: Jul 2002
Posts: 1,329
Likes: 8
From: Corpus Christi Tx.
Re: Clutch Question - Not coming back up? (99firetruck)
Does anyone know the service bulletin # or where to locate a copy of it. My dealer says he hasn't seen it.
After heavy acceleration the clutch will not come back up all the way - I have heard many people speak on this but i do not recall seeing an actual "fix".
The Stealer said they have run into this problem before and stated they knew what it was.
I just got my car back from the stealer, they replaced the master and slave cylinders and i took the car out for a run and the problem still exists???
Is there something i can reference them twards? I already mentioned about wrapping the lines with some type of heat resistant wrap but they just looked at my funny.
Thanks!
The Stealer said they have run into this problem before and stated they knew what it was.
I just got my car back from the stealer, they replaced the master and slave cylinders and i took the car out for a run and the problem still exists???
Is there something i can reference them twards? I already mentioned about wrapping the lines with some type of heat resistant wrap but they just looked at my funny.
Thanks!
Drifting
Joined: Jul 2002
Posts: 1,329
Likes: 8
From: Corpus Christi Tx.
Re: Clutch Question - Not coming back up? (99firetruck)
Contacted another dealer and he said this was a U/I (Unpublished Information) document, not a service recall. It does in fact call for replacement of the master and slave cylinders as well as Inspection of the finger of the pressure plate for damage. It should all be covered under warranty :cheers:
Thread Starter
Melting Slicks
Joined: Dec 2002
Posts: 2,480
Likes: 62
From: Middletown DE
Re: Clutch Question - Not coming back up? (ICUALL)
I am not uncertain of what parts they used, but they did replace the slave and master with no resolution...
they mentioned that it is NOT covered by my Extended warranty - but they did it under some post factory warranty grace period thing? In other words - sorry we screwed up your front bumper - well take car of the clutch.
they mentioned that it is NOT covered by my Extended warranty - but they did it under some post factory warranty grace period thing? In other words - sorry we screwed up your front bumper - well take car of the clutch.
Burning Brakes
Joined: Oct 2001
Posts: 1,116
Likes: 0
From: Alhambra Calismognazifornia, in the country everyone comes just to complain but won't go back home!
Re: Clutch Question - Not coming back up? (99firetruck)
i have an '02 and i have the same problem so that fix is :bs
i had the pedal return spring break on me once already but putting a new one in didn't do a damn thing. my only guess would be a weak clutch plate that can't handle the extra heat build up of hard driving. i'm going to take it in soon to get checked. if they feed me a line of the same crap i'm just gonna change it out for a SPEC clutch and be done with it.
anyone that finds a solution other than the changing to '02 stuff please be sure to keep us all informed :cheers:
i had the pedal return spring break on me once already but putting a new one in didn't do a damn thing. my only guess would be a weak clutch plate that can't handle the extra heat build up of hard driving. i'm going to take it in soon to get checked. if they feed me a line of the same crap i'm just gonna change it out for a SPEC clutch and be done with it.
anyone that finds a solution other than the changing to '02 stuff please be sure to keep us all informed :cheers:
Le Mans Master
Joined: Aug 2002
Posts: 8,472
Likes: 38
From: Houston TX
St. Jude Donor '11
Re: Clutch Question - Not coming back up? (Walt Donovan)
You guys with the no-come-back clutches - Is it only at big RPMs, like a WOT shift?
If I don't drive the car for a couple days, the clutch is super easy to push in but after about 5-10 minutes it's back to normal, a lot harder at times and inpredicatable. I felt the clutch of my friend's new '03 Z06 and it was like butter, much better!
Drifting
Joined: Jul 2002
Posts: 1,329
Likes: 8
From: Corpus Christi Tx.
Re: Clutch Question - Not coming back up? (99firetruck)
Same with my only seems to occur at high rp's under heavy acceleration. The dealer is willing to change out the parts as listed in the U.I. document, but it has to wait until after the 50th Caravan I leave Monday Morning for Nashville.
Racer
Joined: Feb 2001
Posts: 286
Likes: 0
From: Bayville NJ
Re: Clutch Question - Not coming back up? (ICUALL)
You guys reallize that non-returning clutches at high RPMs is a characteristic of diphragm clutches, right? They go overcenter and centrifugal force holds them disengaged. Some aftermarket pressure plates and maybe Z06 address this. Is it possible that's what your experiencing?
Burning Brakes
Joined: Sep 2000
Posts: 1,166
Likes: 0
From: Scottsdale AZ
Re: Clutch Question - Not coming back up? (ICUALL)
This is what I gave to my dealer and it was all done under warranty.
Sticking Clutch – Clutch will not fully return under hard acceleration and high RPM shifts – VME# P100206 Please replace with 2002 Z06 Clutch Assembly Part # 012570806, Slave Part # 012562767, Master Part # 012564455
-Rob
Sticking Clutch – Clutch will not fully return under hard acceleration and high RPM shifts – VME# P100206 Please replace with 2002 Z06 Clutch Assembly Part # 012570806, Slave Part # 012562767, Master Part # 012564455
-Rob
Instructor
Joined: Dec 2002
Posts: 181
Likes: 1
From: salt lake city ut
Re: Clutch Question - Not coming back up? (Walt Donovan)
Yes I know this is common with diaphram clutches however chevy has been using them for 30-40 years and I had hoped they had the bugs worked out.
:banghead:
:banghead:
Melting Slicks
Joined: Jan 2000
Posts: 3,029
Likes: 1
From: Wichita KS
Cruise-In I Veteran
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Re: Clutch Question - Not coming back up? (Walt Donovan)
You guys reallize that non-returning clutches at high RPMs is a characteristic of diphragm clutches, right? They go overcenter and centrifugal force holds them disengaged. Some aftermarket pressure plates and maybe Z06 address this. Is it possible that's what your experiencing?
I would think you should be able to fix this with an adjustable Master Cylinder. If you adjust it so it engages closer to the floor it should help the problem. It then wouldn't disengage it too far(push the diaphram fingers over center)
I don't know if anyone has tried an adjustable master cyl on a stock pressure plate yet or not?? might be worth a try 'cause its easy to do
[Modified by Flyin'Brian, 7:26 PM 6/20/2003]
Instructor
Joined: Feb 2002
Posts: 181
Likes: 0
From: VA
Re: Clutch Question - Not coming back up? (99firetruck)
I am not uncertain of what parts they used, but they did replace the slave and master with no resolution...
they mentioned that it is NOT covered by my Extended warranty - but they did it under some post factory warranty grace period thing? In other words - sorry we screwed up your front bumper - well take car of the clutch.
they mentioned that it is NOT covered by my Extended warranty - but they did it under some post factory warranty grace period thing? In other words - sorry we screwed up your front bumper - well take car of the clutch.