col182
Member
Registered: 24th Jan 05
Location: Eaglescliffe, Stockton-on-Tees
User status: Offline
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Hiya, I have a problem with my brakes on my Corsa GSI. I only bought it on Thursday and it had no brake pedal. It looks as if it has had the brakes upgraded on the front. It has the calipers where you take them off using a 7mm allen key, but it is still on standard GSI alloys. Does anyone know if these are GTE brakes?
Well back to my problem, the brake pedal goes right to the floor. I have tried bleeding them today with no luck. If you pump the brake pedal quickly you can get a pedal, but as soon as you release it will go to the floor again. I have checked the rear wheel cylinders and they are not leaking.
Could it be the master cylinder? is there any way to check it?
Cheers for any help, Col
[Edited on 04-03-2006 by col182]
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col182
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Registered: 24th Jan 05
Location: Eaglescliffe, Stockton-on-Tees
User status: Offline
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Any ideas anyone?
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Ian
Site Administrator
Registered: 28th Aug 99
Location: Liverpool
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You might need to wait more than 16 minutes.
Are you getting a dash light? Does the fluid look OK?
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col182
Member
Registered: 24th Jan 05
Location: Eaglescliffe, Stockton-on-Tees
User status: Offline
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 True about the time,
The fluid looks good,
The ABS light came on but went back off after turning the ignition off.
The handbrake light was on when i was driving it home but has stayed off since blleding.
Col
[Edited on 04-03-2006 by col182]
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Joe
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Registered: 20th Jun 04
Location: Hesketh Bank, Lancashire
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Did you notice if the bleed nipples are at the top or the bottom? They should be at the top, if they are there will be air in the calipers.
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col182
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Registered: 24th Jan 05
Location: Eaglescliffe, Stockton-on-Tees
User status: Offline
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The bleed nipples are on the top. I have bled them today a couple of times so im 90% sure they have no air in.
I can get a pedal if i pump it up quickly but then loose it when i release. It's as if the fluid is leaking back past the seals in the master cylinder
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col182
Member
Registered: 24th Jan 05
Location: Eaglescliffe, Stockton-on-Tees
User status: Offline
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Does anyone know how to test a master cylinder. Can i just blank the holes off and try press it?
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x14xe
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Registered: 15th Dec 05
Location: Sutton-on-Hull, Kingston upon Hull
User status: Offline
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have you had a look at the rear brake shoe asjusters?
They can seize up and be stuck in a low position.
The shoes will move and not make contact with the drum, therefore there will be no brake pedal ( I thinks)
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col182
Member
Registered: 24th Jan 05
Location: Eaglescliffe, Stockton-on-Tees
User status: Offline
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Cheers X14, i noticed they were a bit tough to turn. I locked off both rears using a set of mole grips on each side and there was still no pedal. Do ABS modulators ever go wrong?
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carnuts
Member
Registered: 28th Aug 05
Location: Hertfordshire
User status: Offline
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abs wont effect your pedal have you tried bleeding the master cylinder?
i cant remember whether you can bleed them on corsas you should be able to!
if not the master cylinder normally leaks down the front of the servo so that is worth checking
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col182
Member
Registered: 24th Jan 05
Location: Eaglescliffe, Stockton-on-Tees
User status: Offline
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Cheers Carnuts, I've slackened the two brake pipes off the ABS modulator that come from the the master cylinder and bled them from there.
I can't see any fluid leaking from the master cylinger, might it leak into the servo?
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carnuts
Member
Registered: 28th Aug 05
Location: Hertfordshire
User status: Offline
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could do but i have never seen it normally it bubbles the paint on the servo because of the corrosivenous of brake fluid try slacking it off and checking behind
it might be the master cylinder but normally they dont mess up without signs of leakage
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