HELP rear disks keep locking up - Corsa Sport - for Vauxhall and Opel Corsa B, Corsa C and Corsa D

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Corsa Sport » Message Board » Help Zone, Modification and ICE Advice » HELP rear disks keep locking up

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SteveW

Member

Registered: 15th Jul 02
Location: Up in the clouds
User status: Offline

15th Sep 05 at 09:54

right i got me some vectra front disks and calipers (V6 jobbies) as well as a rear disk conversion

when i really hammer the brakes (emergency stop stylee) the back end locks up EVERY TIME and starts going sideways

please help cos i dont know how to change the brake bias over to be more for fronts than rears...

cheers peeps

Steve

Filby1

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Registered: 12th Dec 03
Location: Brighouse
User status: Offline

15th Sep 05 at 10:36

i have have 2ltr setup up alround with rear disks and 40-0MPh and same with 30-0mph i only get the very slightist rear end brake if i hammer down the hill near me its the fronts that lock up, odd prob that but having said that mines an 8v and does not have the bias adjustment on the rear

Fad

Member

Registered: 1st Feb 01
Location: Dartford Kent Drives: 330cd
User status: Offline

15th Sep 05 at 13:24

sounds like a brake compensator problem mines petty screwed was talking to Lee Mitchell and he says he just takes them out when doing a disc conversion.

Siberia

Member

Registered: 9th Oct 03
Location: Leprechaun Land Drives : Zafira GSI
User status: Offline

15th Sep 05 at 13:28

brake bias valve... they also cause problems if the car is lowered

Rileysport

Member

Registered: 18th Jun 04
Location: West Yorkshire
User status: Offline

15th Sep 05 at 13:32

quote:
Originally posted by Siberia
brake bias valve... they also cause problems if the car is lowered

do they ?????

SteveW

Member

Registered: 15th Jul 02
Location: Up in the clouds
User status: Offline

15th Sep 05 at 13:51

hmmmmm

gotta ask the mad scientist about this then

Will_Sport

Member

Registered: 28th Jun 04
Location: Notts
User status: Offline

15th Sep 05 at 14:18

oooh some info for me then as my brake bias valve needs adjusting, (its a 16v), proper eating brake shoes (drums) and back end gets a lil slippy

Siberia

Member

Registered: 9th Oct 03
Location: Leprechaun Land Drives : Zafira GSI
User status: Offline

15th Sep 05 at 14:41

quote:
Originally posted by SRi-Co

quote:
Originally posted by Siberia
brake bias valve... they also cause problems if the car is lowered

do they ?????

well the girlfriends tigra is lowered 60mm and i nearly stuck into a hedge one night whilst braking hard

Rileysport

Member

Registered: 18th Jun 04
Location: West Yorkshire
User status: Offline

15th Sep 05 at 14:54

i'm down something really quite insane at the mo... never touched the bias and its fine

M559 WOW

Member

Registered: 4th Feb 04
Location: North Wales
User status: Offline

16th Sep 05 at 11:10

Im having trouble with my brakes at the mo because of this bias valve. Ive only lowered the car 40 and the rear keeps locking up under really heavy braking. Im only running the standard front brakes at the mo (1600 16v sport) but i need to do something soon cos its dangerous!!

Siberia

Member

Registered: 9th Oct 03
Location: Leprechaun Land Drives : Zafira GSI
User status: Offline

16th Sep 05 at 12:54

quote:
Originally posted by SRi-Co
i'm down something really quite insane at the mo... never touched the bias and its fine

i think you have the same kit i have in the misus's car... bilstein ultra low kit from www.tuning.co.uk?

have you deffo got a bias valve?

Rileysport

Member

Registered: 18th Jun 04
Location: West Yorkshire
User status: Offline

16th Sep 05 at 12:56

i have got bias valve.. it needed a new one for last mot... Spot on with the springs sib, can't fault em

Siberia

Member

Registered: 9th Oct 03
Location: Leprechaun Land Drives : Zafira GSI
User status: Offline

16th Sep 05 at 12:59

yeah that kit is fairly brillaint for handling her car handles like an evo 6 lol... rough as feck though

X 60RSA

Member

Registered: 20th Aug 01
Location: Lincoln
User status: Offline

16th Sep 05 at 17:28

When ya lower your car, look at the spring on the bias valve, doesn't this extend and add pressure to some valve, it thinks u have alot of people in the back of the car so its trying to compensate for this. Most of the time u wont have any weight in the back hense why it may lock up under heavy breaking!

My spring snapped on my old car and i just left it, maybe u can just take it off!?

ainsley_brader

Member

Registered: 24th Mar 02
Location: Tattershall, Lincolnshire
User status: Offline

16th Sep 05 at 17:58

no spring would be an mot failure though you would have to refit it for mots!

and-m

Member

Registered: 5th May 02
Location: Liverpool. Drives. Skud vRS.
User status: Offline

17th Sep 05 at 16:01

I dont see how it can fail as long as the brakes operate to the minimum specifications. My spring rusted and fell off!

Adam_B

Member

Registered: 13th Dec 00
Location: Lancashire
User status: Offline

18th Sep 05 at 16:29

is it only sports and GSis etc that have these adjustable valves? mine started life as a 1.2 8v im sure i dont have one. Can you adjust the bias without one?

[Edited on 18-09-2005 by Adam_B]

Ant

Member

Registered: 12th May 02
Location: Hereford and Worcester
User status: Offline

18th Sep 05 at 22:46

I tryed hitting mine with hammer to stop this in the end I found the bwst fix was to take it off

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