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Help, can't solve a brake problem

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Old May 12, 2013 | 09:37 PM
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Default Help, can't solve a brake problem

I have a 1965 disc brake (non power) corvette. I have recently installed all 4 rebuilt calipers, new pads, brake lines, front rubber brake hoses, and had the master cylinder rebuilt by a highly rated brake shop.
The car continues to pull very hard to the left. I don't believe there is any proportioning block like on a 1967. I have bled the brakes in the correct sequence from furthest to closest caliper. I am frustrated and out of tricks. Anybody got an idea what could be the problem ??? Thanks. Jim
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Old May 12, 2013 | 09:42 PM
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Jim,

I would get it up off the ground an manually verify that each caliper is grabbing... it sure sounds like the right front is not.
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Old May 12, 2013 | 09:43 PM
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Just becouse it's new parts and rebuilt dosent mean its any good so don't rule out the usual parts
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Old May 12, 2013 | 09:44 PM
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Sounds like you did all the right things....Try re-bleeding the system to see if that helps....
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Old May 12, 2013 | 09:46 PM
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Maybe if you have driven the car several miles the rotor might be out of true and pulsating the pads, and in turn pumping air. Dennis
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Old May 12, 2013 | 10:21 PM
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Default bad brakes

Thanks for your advise, next step is to turn rotars
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Old May 12, 2013 | 10:33 PM
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In reading the parts you have replaced you don't mention the soft lines to the rear calipers. I would start here... replace the rear soft lines..

Hitch
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Old May 13, 2013 | 12:01 AM
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could be the rear short rubber lines.. I am thinking with the severe pull it is more front. I will turn front rotors and check again. tks.. jim
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Old May 13, 2013 | 12:45 AM
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If you have a heat gun drive the car with your foot on the brake for a few seconds to heat up the rotors and then shoot the rotors with the heat gun to see which one is the lowest temp and that would narrow it down to the least grabbing caliper & rotor real fast.
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Old May 13, 2013 | 06:42 AM
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Originally Posted by BILLY 63 swc
If you have a heat gun drive the car with your foot on the brake for a few seconds to heat up the rotors and then shoot the rotors with the heat gun to see which one is the lowest temp and that would narrow it down to the least grabbing caliper & rotor real fast.
Good idea!

I wouldn't fool with turning the rotors.

Have you looked at the suspension for worn/loose components that could be letting the front end shift on braking?
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Old May 13, 2013 | 07:46 AM
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Originally Posted by moonframer
I have recently installed all 4 rebuilt calipers, new pads, brake lines, front rubber brake hoses, and had the master cylinder rebuilt by a highly rated brake shop.
The car continues to pull very hard to the left.
After replacing all of the above due to leaks and bad hoses, I had a similar problem, which turned out to be a bent calliper bracket.

With the front calliper bolted on and the rotor in place, everything appeared normal, but with the rotor off, I could clearly see
the calliper was on an angle to the rotor and not allowing the whole pad surface to make contact.

It's a long shot, but worth a look
Thanks again Dan BTW
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Old May 13, 2013 | 08:44 AM
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Q. was it pulling before you did the brakes? If yes, then check out the rear trailing arm shims and alignment, and then the front end for loose A-frame bushings.
If no, then I'd suspect one of your "rebuilt" calipers is sucking air and not grabbing. Put it in the air with someone in the drivers seat, and apply the brakes lightly and check if all the wheels are grabbing the same.
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Old May 13, 2013 | 08:51 AM
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Always bleed brakes from the bleeder screw, not the brake line. Just a thought as I just ran into a situation were someone was doing this. Dave
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Old May 13, 2013 | 10:15 AM
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Have you tried jacking up the front of the car and have someone gradually apply the brakes while you spin the right front tire and see what kind of braking effort you are getting. Kind of sounds like the caliper is not working or the pads are contaminated. Compare it to the left one
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Old May 13, 2013 | 11:41 AM
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switch front tires. could be a bad tire.
Did u deglaze the rotors?

Last edited by Matt Gruber; May 13, 2013 at 11:51 AM.
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Old May 13, 2013 | 10:40 PM
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I have done that a few times and it seems like the right and left front grab the same. I an putting on new pads and having the rotors cut.

Kind of running out of ideas... Tks
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Old May 13, 2013 | 10:42 PM
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Thanks, I have done that and they feel the same.
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