Lazarus1
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Registered: 5th Apr 02
Location: Skopje,Macedonia
User status: Offline
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I've just replaced my old brake disks and brake pads on my 1.4 16v Corsa B.
1.The new disks are QH brakes(made in GB),and Delta brake pads.Are they any good?(the disk dimension is the same as the OEM one)
2.Can i brake as hard as i want with the new system,cause the mechanic told me it's ok to brake hard cause the disks and pads are brand new.
But when i tested them the braking was worse than my old brakes and the car goes sideways.He told me that the rear is braking harder than the front cause the disks and pads are new and that it will improve in a few days of normal braking after they have beded in.How many miles do you recon it will take?
3.There was a vibrating feeling on the brake pedal before and the vibrating is still there!!!Thought that it was because of warped disks but it turned out not be....The mechanic told me that it has something to do with the rear brake shoes.Cause my tracking is ok,wheels are balanced.
Please help me,if you can answer these 3 questions i would be greatful cause i'm starting to think than there's not one competent mechanic in this blody coutry! 
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dna23
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Registered: 1st Nov 04
Location: Northamptonshire
User status: Offline
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1. Not sure Vauxhall brakes are the best iirc unless you're spending silly money on 4 pots .etc
2. Don't just go out and brake hard  you need to bed your brakes in... http://corsasport.co.uk/board/viewthread.php?tid=288304
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Lazarus1
Member
Registered: 5th Apr 02
Location: Skopje,Macedonia
User status: Offline
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Dna23
i didnt understand your answer to my 1st question?Quinton Hazell is Vauxhall?
And i did about a dozen emergency braking on my way home to test the brakes
Hope i didn't mess something up??
Ok i'll do normal gentle braking in the next 100miles to let them bed in.Hope the braking will improve and that the rear end wont throw me of the road any more.
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dna23
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Registered: 1st Nov 04
Location: Northamptonshire
User status: Offline
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Sorry didn't realise they were genuine vauxhall stuff
My brakes were crap when i fitted them but then i bedded them in and they're quality now  just give them time mate and take it easy... read that thread it should help!
Also, have you lowered your car? Usually that affects the brake bias and can cause your back end to step out as you describe,
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Lazarus1
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Registered: 5th Apr 02
Location: Skopje,Macedonia
User status: Offline
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I did read your thread mate,and the car has been lowered for ages and the braking was spot on.I think that the rear steps out cause the front brakes aren't that good cause they need to bed in.Would you agree?
Changing front brakes and brake disks cannot affect the brake bias,right?
about the brake fluid it wasn't replaced or anything,the mechanic just told me to pump the brake untill i get the normal feel?do you think we did the procedure right?Do you think the system needed bleeding?
[Edited on 12-07-2006 by Lazarus1]
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dna23
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Registered: 1st Nov 04
Location: Northamptonshire
User status: Offline
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He should have done something along the lines of this:
http://www.corsasport.co.uk/board/viewthread.php?tid=219303
Not sure on how changing brakes would effect the rear stepping out but lowering your car should... changing the brakes may have just enhanced this. Did you adjust your brake bias valve or disconnect it?
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Lazarus1
Member
Registered: 5th Apr 02
Location: Skopje,Macedonia
User status: Offline
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I really don't know.
I don't understand brake bias valve....but i think that i understand more than this mechanic and that pisses me off...i told him this:
"You will now need to bleed the brake system. On ABS modles the curcuits are split front and back. On non-ABS models the brakes are split diagonally, so you bleed the front left caliper then the rear right and so on. However, if you clamped the brake hoses and did no loose a lot of brake fluid it is only neccesary to bleed the front brakes on ther own, the case would be the same on ABS modles as the rear brakes are on a different curcuit."
But he thinks other wise.The link you just sent me i've red it 10 times before but i'm not a mechanic and i don't understand this things.
Thank you for your time dna23,i realy appriciate it....i'll see what i'm gonna do with this problem,but i'm sure i wont be taking my car to his garage anymore.
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scaramanga
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Registered: 9th Jul 06
Location: airdrie
User status: Offline
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no need to bleed brakes when changing pads n discs just push piston on caliper all the way in with prybar.but take cap off reseviour first.
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bubble
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Registered: 24th Jan 04
Location: Darwin, NT Australia.
User status: Offline
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i remember havin new pads n discs on mine and rear shoes n drums-i had poopy brakes for about 4 hours!!
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Chris_Sport
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Registered: 6th Jan 05
Location: Barrow In Furness
User status: Offline
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I've just changed the front discs and pads on mine and it has taken about 2 weeks for them to get anywhere near reasonable again. Probably done about 500 miles. Only use them lightly for the next few hundred miles. You probably notice the back stepping out more because the back brakes are better than the front at the moment.
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Lazarus1
Member
Registered: 5th Apr 02
Location: Skopje,Macedonia
User status: Offline
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Thanks for all the replies guys,i really appriciate it.
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