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Bleeding brake problem

Den13 Jan 4, 2013

  1. Den13

    Den13 Member

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    Changed the disks and pads on the a3 because they were rubbish, still rubbish so done a quick google search and found this old thread http://www.audi-sport.net/vb/a3-s3-...problem-audi-dealer-cant-bleed-them-even.html so want to try the Ross-Tech: VAG-COM: ABS Brake Pump Bleeding before changing the master cylinder btw my brakes are doing the same as the one in the thread, could someone explain in more detail the Ross-Tech: VAG-COM: ABS Brake Pump Bleeding technique I may be missing something but it seams like a brief discriprion also how to bleed the master cylinder
     
  2. <tuffty/>

    <tuffty/> Badger 5 Edition...Its all about the flow... Staff Member Moderator Audi S3

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    You don't need to bleed the ABS pump unless you have changed it or have introduced air into the system upstream of the ABS pump...

    Generally these will just need bleeding using a pressure bleeder (don't use the 'pump the pedal' method) and make sure you bleed the master cylinder last..

    What do you mean when you say your brakes are rubbish? new disks and pads take a few miles to bed in and get their bite...

    <tuffty/>
     
  3. Den13

    Den13 Member

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    In general the brakes were soft from we got the car thought although new looking pads still spongy pedal, so thought perhaps Cheap pads and disks as had been the case with my Mondeo so got apex ones but pedal is worse gose right down before it bites and really soft and when you pump it and hold it, it slowly gose back down as mention in the before thread so perhaps it's previously had pump etc change and not bleed properly??
     
  4. <tuffty/>

    <tuffty/> Badger 5 Edition...Its all about the flow... Staff Member Moderator Audi S3

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    Bleed the master cylinder before doing anything... use a pressure bleeder...

    <tuffty/>
     
  5. <tuffty/>

    <tuffty/> Badger 5 Edition...Its all about the flow... Staff Member Moderator Audi S3

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    ...and add paragraphs to your posts... makes them difficult to read...

    <tuffty/>
     
  6. gen.heinz guderian

    gen.heinz guderian Well-Known Member VCDS Map User

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    Might be a silly question but has the Brake fluid been changed recently?
     
  7. Den13

    Den13 Member

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    Ok and as far as I know it has not had a change in brake fluid not from we got the car anyway
     
  8. <tuffty/>

    <tuffty/> Badger 5 Edition...Its all about the flow... Staff Member Moderator Audi S3

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    So you haven't actually bled the brakes at all? fluid needs to be changed every 2 years... get some fluid and a pressure bleeder (Gunsuns Eezi bleed) and get it changed

    <tuffty/>
     
  9. gen.heinz guderian

    gen.heinz guderian Well-Known Member VCDS Map User

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    Brake fluid absorbs water over time,so might be good idea to change it , especially if you have no records of it being done.
    Also new fluid will reduce the spongy pedal as well.
     
  10. Den13

    Den13 Member

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    Don't have a pressure bleeder so will try bleed it the old fashiond way to see if there's any improvement doubt it tho after that most Likly fails will get it to a garage and should i ask them to pressure bleed the brake system and master cylinder??
     
  11. Den13

    Den13 Member

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    I think the mrs bleed them the last time she done the back brakes a few weeks ago need to ask her, but am pritty sure she did
     
  12. Den13

    Den13 Member

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    Ah well she says she never done it so will try that tomorrow and if that dont work will get it pressure bled
     
  13. Nilz

    Nilz Defo worth the wait :) Team Ibis TFSI Owners Group quattro Audi A4 S-line owners group saloon Manual

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    I wouldnt do it the old fashioned way, apparently our cars have something that if you do it the old fashioned way and it flips from inside, there is no way of unflipping it and it can end up causing more issues.....

    Might be worth doing a search, as there is alot of info on bleeding the brakes and about doing it the right way too.
     
  14. Den13

    Den13 Member

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    What amount of fluid will I need to drain the system and refill it
     
  15. Den13

    Den13 Member

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    So what's the verdict do it the old fashiond way see if it improves any then get the system drained and filled pressure bled and master cylinder bled or just leave the old fashions way all together and just get it pressure bled
     
  16. gen.heinz guderian

    gen.heinz guderian Well-Known Member VCDS Map User

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    Just get it pressure bled to avoid problems.
     
  17. Den13

    Den13 Member

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    Bled including getting it emptied and filled
     
  18. Den13

    Den13 Member

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    How much fluid will I require
     
  19. <tuffty/>

    <tuffty/> Badger 5 Edition...Its all about the flow... Staff Member Moderator Audi S3

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    Do NOT use the old fashioned way... you will nick or flip the master cylinder seals and it will need replacing... use a pressure bleeder...

    I used a 1ltr tin of fluid... from GSF its not much more than a tenner

    <tuffty/>
     
  20. hardhitter

    hardhitter Member

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    I find the gunson isn't up to the job with bleeding problematic brakes (e.g air in the system). I use the sealey VS820 power bleeder, it works well and is worth the money.
     
  21. Den13

    Den13 Member

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    Ok cheers again guys
     
  22. Nilz

    Nilz Defo worth the wait :) Team Ibis TFSI Owners Group quattro Audi A4 S-line owners group saloon Manual

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    As Tufty says, dont do the old fashioned way, you will cause more problems for yourself.


    Get a litre or two, it doesnt cost much and you have extra just in case.
     

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