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TQS Brake fade

Discussion in 'A4/S4 forum(B5 Chassis)' started by Chriscooke, Oct 12, 2012.

  1. Chriscooke
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    Chriscooke Clueless!

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    I was on a private stretch of road the other day trying to keep up with a mate in a more powerful/lighter car so I was leaning on the car quite heavily. Everything was fine until I was under heavy braking in to a tight right hander when I lost my brakes completely.

    Does the qts often suffer from brake fade? I'm not sure when the fluid was last changed so I will need to do this as I guess I boiled it the other day :eek:
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  2. Broken Byzan
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    Broken Byzan Photographic Moderator Staff Member Moderator

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    Heavy car, rubbish brakes. Change the fluid and get some decent pads fitted if you are going to drive like this regularily
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  3. Chriscooke
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    Chriscooke Clueless!

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    It's not a regular thing at all tbh. I always thought the brakes were decent but guess not.

    I may have been using them as hard as I do with my 200sx equiped with 345mm wilwood fronts and 2 pot 290mm skyline rears and it only weighs 1200 kg.

    Will have to change the fluid and check the pads as they haven't been the same since.
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  4. Broken Byzan
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    Broken Byzan Photographic Moderator Staff Member Moderator

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    Sounds like you have cooked them. Change them and the fluid and it will be worlds apart. The TQS is 1500 odd KG and the brakes are silly small considering it's capabilities
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  5. Chriscooke
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    Chriscooke Clueless!

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    Cheers for the advice mate :) Wasn't sure if it was a common problem or not but judging by your replies it's not unheard of :) Will have a refresh of parts asap :)
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  6. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator

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    What actually happened?

    If the pedal went hard and your car didnt stop, thats pad fade.
    If the pedal went really soft and you didnt stop, thats boiled brake fluid.

    Pad fade will usually recover with no adverse effects once its cooled down again. However if you boiled the fluid you'll need to flush it thru and the pedal will probably feel a bit soft and spongey until you do.
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  7. jcb
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    jcb Active Member

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    or just save your time and get rid of the standard ones.

    I had a sphincter tightening moment coming up a slip road at speed.
    total pad fade left me looking for an escape route!
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  8. Chriscooke
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    Chriscooke Clueless!

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    By your explanation I boiled the fluid as I lost the pedal completely.

    Seeing as this is my daily I don't really want to mess around upgrading brakes etc. I don't intend to take this car on track etc so hopefully some new fluid etc will do for now :)
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  9. Oranoco
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    Oranoco Well-Known Member

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    Yep I boiled my fluid playing keep up with my mates Mk1 Focus RS. Was a tad worrying approaching a tight bend at 120mph with the pedal just going soft.
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  10. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator

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    Get some good fluid in there then. ATE blue seems good value.
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  11. Chriscooke
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    Chriscooke Clueless!

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    Heard of ate blue I think. Is that the stuff that is repellant to moisture?
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  12. gmx
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    gmx Member

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    that stuff may also cause clutch squeak.
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  13. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator

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    No brake fluid is resistant to moisture.
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  14. Foxmeister
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    Foxmeister Fired Up!

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    Brake fluid is Hydroscopic, meaning it can take in water.
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  15. jcb
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    jcb Active Member

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    hence why it boils...it is the water boiling off
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