URGENT! Brake Problems!
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Joined: Jun 2010
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From: Miami FL
Help
Update: Seems like the proportional valve was malfunctioning because I would blow air into and no air will come out either side. Now the new one I purchased air comes out on each side. My concern now is should I do a complete bleed of the system in terms of disconnecting brake lines or other things now that I am installing a new proportional valve? I don't want to mess it up this little valve cost me $130.00.
Race Director
Joined: May 2005
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From: West Norriton PA
St. Jude Donor '08
Update: Seems like the proportional valve was malfunctioning because I would blow air into and no air will come out either side. Now the new one I purchased air comes out on each side. My concern now is should I do a complete bleed of the system in terms of disconnecting brake lines or other things now that I am installing a new proportional valve? I don't want to mess it up this little valve cost me $130.00.
What do I get since I guessed right.
You'll need to go to a dealer or find someone with a Tech2 to do the bleeding correctly.
The Tech2 does and automated bleed on each individual line circuit.
In the mean time, just do a normal bleed job after replacing the proportioning valve and then go hit a dealer up for the automated bleed procedure.
Tech Contributor
Joined: Oct 1999
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From: Charlotte, NC (formerly Endicott, NY)
Does the new valve come with the proportioning spring in it already or do you have to reuse the spring from the old valve? If you want more rear braking this may be the time to switch over to the DRM proportioning spring which adds more rear brake bias.
Bill
Bill
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From: Miami FL
Yes comes with a spring already in it. I was looking for the DRM one but on the website I did not find anything on the proportioning spring or valve so I assumed they did not sell it anymore.
Tech Contributor
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From: Charlotte, NC (formerly Endicott, NY)
http://dougrippie.com/?p=404
I would give them a call to make sure this is the C5 version which only applies to 97 through 00 C5s. After 00 GM didn't use a spring.
Bill
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From: West Norriton PA
St. Jude Donor '08
Their website isn't the most user friendly. I searched under brake bias spring and found it:
http://dougrippie.com/?p=404
I would give them a call to make sure this is the C5 version which only applies to 97 through 00 C5s. After 00 GM didn't use a spring.
Bill
http://dougrippie.com/?p=404
I would give them a call to make sure this is the C5 version which only applies to 97 through 00 C5s. After 00 GM didn't use a spring.
Bill
Don't do the DRM spring. There are (3) different versions of the spring and if you get the wrong one you will have the same problems as you're having now.
Ask me how I know
Tech Contributor
Joined: Oct 1999
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From: Charlotte, NC (formerly Endicott, NY)
Bill
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From: West Norriton PA
St. Jude Donor '08
No real need for it unless you're driving the vette really hard.
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Thread Starter
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Joined: Jun 2010
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From: Miami FL
FINAL: Once I replaced the valve all is fine. Once I put the vehicle in drive or reverse it moves normally without the any touching of the gas pedal. My front rotors possibly could have been bent from all the heat that they have taken because they still are sticky. But I am putting new rotors in tomorrow and pads to see how all works out but at least I can drive 
thanks to all especially ajg1915 if and when your in Miami I'll buy you a beer .
thanks to all especially ajg1915 if and when your in Miami I'll buy you a beer .
Race Director
Joined: May 2005
Posts: 15,960
Likes: 21
From: West Norriton PA
St. Jude Donor '08
FINAL: Once I replaced the valve all is fine. Once I put the vehicle in drive or reverse it moves normally without the any touching of the gas pedal. My front rotors possibly could have been bent from all the heat that they have taken because they still are sticky. But I am putting new rotors in tomorrow and pads to see how all works out but at least I can drive thanks to all especially ajg1915 if and when your in Miami I'll buy you a beer .
thanks to all especially ajg1915 if and when your in Miami I'll buy you a beer .
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From: Burlington NC
Randy
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Joined: May 2005
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From: West Norriton PA
St. Jude Donor '08
Just thought he should resolve the primary problem first. DRM makes some awesome stuff, I guess we were just one of the unlucky ones that it did not work right with.
Starting to think that maybe the proportioning valve in Keith's car was not the original.
Seems there a subtle differences and I think that this was our problem.
Thanks Randy as always for help.
