Brake bleeding help?
Thread Starter
Le Mans Master
Joined: Feb 2000
Posts: 9,600
Likes: 88
From: Springfield PA
Philly 'Burbs Events Coordinator
Brake bleeding help?
I replaced the master cylinder in the vert tonight. Followed the manual and the whole job went well. Bled the brake system by bench bleeding the master, then going to the ASR fitting (per manual), then using my Mity Vac at all wheels (in the order per the manual). Front bled good, rears good at first, then couldn't get any fluid out. Got help and had someone work the petal while I cracked each bleeder. Bled all until all the fluid was new. Looked like all the air is out.
BUT.......
The brake pedal feels slightly harder than I think it should. Car stops good at high speed and low speed but could stop better at 20 - 50 MPH
Any ideas to get a better petal?
:cheers:
[Modified by Rex Ruby, 11:58 PM 6/29/2003]
BUT.......
The brake pedal feels slightly harder than I think it should. Car stops good at high speed and low speed but could stop better at 20 - 50 MPH
Any ideas to get a better petal?
:cheers:
[Modified by Rex Ruby, 11:58 PM 6/29/2003]
Melting Slicks
Joined: May 2001
Posts: 2,143
Likes: 7
From: San Diego CA
Re: Brake bleeding help? (Rex Ruby)
...
BUT.......
The brake pedal feels slightly harder than I think it should. Car stops good at high speed and low speed but could stop better at 20 - 50 MPH
Any ideas to get a better petal?
[Modified by Rex Ruby, 11:58 PM 6/29/2003]
BUT.......
The brake pedal feels slightly harder than I think it should. Car stops good at high speed and low speed but could stop better at 20 - 50 MPH
Any ideas to get a better petal?
[Modified by Rex Ruby, 11:58 PM 6/29/2003]
First thought would be a vacuum leak. Second would be booster. Just guesses though.
Melting Slicks
Joined: Apr 2001
Posts: 2,877
Likes: 7
Re: Brake bleeding help? (Rex Ruby)
after my master cylinder change I had the same result.. harder pedal. Brakes worked fine but with a much firmer feel. I attributed it the fact that the old cylinder was leaking and causing a mushy feel, when it was repaired and corrected I had to get use to how the car should have been.
how is it compared to your coupe??
since then I have added Baer calipers and stainless lines and the pedal is a rock but it brakes 100% better..
btw, I finished up the headers last friday. Only thing that's left is to bring it to the exhaust shop and have the headers connected to the rest of the corsa which is in place. So, next time we all get together we'll have a couple of the rubies along. :yesnod: :yesnod:
how is it compared to your coupe??
since then I have added Baer calipers and stainless lines and the pedal is a rock but it brakes 100% better..
btw, I finished up the headers last friday. Only thing that's left is to bring it to the exhaust shop and have the headers connected to the rest of the corsa which is in place. So, next time we all get together we'll have a couple of the rubies along. :yesnod: :yesnod:
Thread Starter
Le Mans Master
Joined: Feb 2000
Posts: 9,600
Likes: 88
From: Springfield PA
Philly 'Burbs Events Coordinator
Re: Brake bleeding help? (Ruby6spd)
GOOD POINTS.
I have to drive it again as see how the pedal feels.
The more Rubies the better :cool: :D :cheers:
I have to drive it again as see how the pedal feels.
The more Rubies the better :cool: :D :cheers:
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Re: Brake bleeding help? (Rex Ruby)
:cheers: Harder brake pedal could be like others said, New Master Cylinder!
But 20 to 50 might be air still in the system. If you lightly and quickly hit the brake pedal before hard stopping, does it improve?
I installed a new MC, DRM spring and C5 brakes. I notice pedal/braking responds better if I quickly and lightly tap the pedal before hard stopping
I think I still have air in the MC somewhere
:seeya
:steering:
But 20 to 50 might be air still in the system. If you lightly and quickly hit the brake pedal before hard stopping, does it improve?
I installed a new MC, DRM spring and C5 brakes. I notice pedal/braking responds better if I quickly and lightly tap the pedal before hard stopping
I think I still have air in the MC somewhere
:seeya
:steering:
Instructor
Joined: Jun 2003
Posts: 187
Likes: 0
From: Orange Park Fl
Re: Brake bleeding help? (Rex Ruby)
Just finished flushing and bleeding my system with synthetic Dot 3&4 and got the same response as you. Rode the pedal a little and did a few hard stops to engage the ABS then went back and bled the brakes 1 more time all around. They stop fine now.
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Melting Slicks
Joined: May 2001
Posts: 2,143
Likes: 7
From: San Diego CA
Re: Brake bleeding help? (SPEED750)
The "Proper" way is to use a TECH I or TECH II. Your local chevy dealer can do it. A good Vette shop can to it as well.
I've done it the above way a few times (button it up, run it and hit the brakes hard enough to get the ABS to kick in) and rebleed.
You might just try starting going to about 3-4 MPH so the ABS does it's test cycle then shut down. Do this a few times. Might do as well (but not as fun) as the above.
[Modified by John Row, 9:42 AM 7/2/2003]
I've done it the above way a few times (button it up, run it and hit the brakes hard enough to get the ABS to kick in) and rebleed.
You might just try starting going to about 3-4 MPH so the ABS does it's test cycle then shut down. Do this a few times. Might do as well (but not as fun) as the above.
[Modified by John Row, 9:42 AM 7/2/2003]