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Driver side disc scored

Toonsoldier91 Jan 27, 2020

  1. Toonsoldier91

    Toonsoldier91 Registered User

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    Afternoon everyone

    I’ve just noticed that my drivers side disc is scored they don’t feel very deep yet so I’m hoping I can save it as I don’t wanna be replacing them 9 months into ownership

    Any tips on what I could do ?? Some heavy breaking from say 70? Do you think that would help

    Ironically the same thing happened on my a3 saloon but I ended up changing them all anyways but theses cost a fair bit more and the pads still have loads of meat left on them

    Thanks in advance
    1D002CCD-22C1-46D5-BAF1-DB8DE50993E6.jpeg
     
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  3. Kevin Gall

    Kevin Gall Registered User

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    Lightly buff with an angle grinder with a flappy pad on it might take it out

    Sent from my VOG-L09 using Tapatalk
     
  4. jds_sg

    jds_sg Registered User

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    If it doesn't squeal or impair the stopping performance of the vehicle I wouldn't worry, it will just wear out naturally. I guess its the cosmetically unappealing look of it though?
     
  5. Retroman

    Retroman Audi A3 2010 Sportback 2.0 TDI 170 (CBBB engine)

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    The disc looks as if it had more substantial rust at some time (was it stood for a while?) which not only rusted the surface but caused some pitting (the dots over the shiny surface). If the pads are good and the disc surface is still nice and flat, it should wear off naturally with day-to-day braking.
     
    jds_sg likes this.
  6. cuke2u

    cuke2u Well-Known Member

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    It does look very much like the car hasn't been used often enough to prevent rusting, even the backplate has signs of it as well. Mine, after over three years and 16,000 miles look far better...
     
  7. Toonsoldier91

    Toonsoldier91 Registered User

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    The car is driven daily. As for the backing plate it’s more then likely the stuff the local car wash used when I took it to them
     
  8. WesT-gefül

    WesT-gefül Well-Known Member Bronze Supporter

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    Weekly power washing helps prevent this. The dust build up isn’t good for them. There is also a minimum thickness. The lip does look quite deep. My 2016 A4 is due new disks soon, before the end of the year. In wouldn’t put new pads on these disks as it’ll only get worse as there is now a prominent groove.
     
  9. jds_sg

    jds_sg Registered User

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    I don't think the disc looks badly worn, the lip doesn't look deep to me. But it is surprising how much corrosion there is on the disk backplate and the caliper too.
    My car often stands several days without being used as I "work" from home, and yes a bit of surface rust can build up, but not on the backplate and caliper too.
    Have you driven through some really salty water or something like that? Is it parked somewhere where it would get splashed with something more corrosive than just rain water?
     
  10. cuke2u

    cuke2u Well-Known Member

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    Yes definitely, they use acid based cleaners on your wheels, and probably down the sides of the car as well. To be avoided if you don't want those wheels to also corrode...
     
  11. WesT-gefül

    WesT-gefül Well-Known Member Bronze Supporter

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    If you live by the sea and also the roads are salted. Mine look just as corroded but it’s one of the first generation b9’s
     
    Last edited: Jan 28, 2020
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  13. Toonsoldier91

    Toonsoldier91 Registered User

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    I do live close to the sea. Maybe a mile away. I’ll take a photo of the other side if I get chance before it gets dark.

    Thanks for all your advice. Going to take it to a garage on Friday to see if anything is stuck in the pads
     
  14. WesT-gefül

    WesT-gefül Well-Known Member Bronze Supporter

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    Off topic to the disks but when last did you have the break fluid changed? Something people overlook.
     
  15. Toonsoldier91

    Toonsoldier91 Registered User

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    Cars due it’s service in 100 miles. Will be due with that
     
  16. Kakatk

    Kakatk Registered User

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    Some years ago I heard of a manufacturer making pads with a sacrificial abrasive layer that polished the disc and wore off.
     
  17. Toonsoldier91

    Toonsoldier91 Registered User

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    Passenger side is fine as shown


    357C2E93-2EDE-48CC-8971-661C94653C32.jpeg FF40AF87-B71D-463A-95E4-4D2BA6C1035E.jpeg
     

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