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Bump n' Grind [not the good kind]

Discussion in 'A3/S3/Sportback (8P Chassis)' started by A3_Rider, Oct 28, 2011.

  1. A3_Rider
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    A3_Rider Member

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    When I am driving I hear a metallic scraping noise from the back of the car, at first it was as if a steel girder (!!) was under my car, I pull over and check and nothing is there and the exhaust is fine not loose.

    Today I drive off and it happened again but I carried on, it got so loud I thought either the car would fall apart or the exhaust would drop off. Then I slow down, nothing, after going over a slight bump its back and went away after that.

    There is no loss of power or drivability, braking, etc. I am assuming someone has threw a few stones in the exhaust and they are deep in, but the noise doesn't act continious.

    My car has done this twice now over the last month and a half.

    A3 V6 DSG
    #1
  2. Red-Eye
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    Red-Eye Member

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    I had a simular problem once before, it was a stone caught between the rear disc heat shield and the disc. Does it make the same noise in reverse? also going in reverse knocked the stone out ;-)
    Give it a go, hope this helps.
    #2
  3. FranA3
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    FranA3 events moderator Regional Rep

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    as said above if its not a stone then it could even be the heat shield its self could have bent a bit and is catching the disk that makes a nasty noise to fix that literly push the heat shield away a bit from the disk its easy you don't have to push it a lot just a little bit , you can even do that with the wheel still on if you have got big gaps in your wheels to get your hand in there saves taking it off lol
    #3
  4. Farhan
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    Farhan Active Member

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    Had this sound to dude! randomly my cars a 1.8tfsi was going into car park all of a sudden hear this terrible noise as though the exhaust has fallen off and its scraping the floor. Look around the car nothing drive off and it happens again...Go over a bump it stop i was like huh...Never happened again.

    I to think it was maybe a stone or something caught in between brakes or a rotating part which caused it.
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  5. zseano
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    zseano Member

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    ^^ This. I had the exact same problem.. I was driving and bam scraping noise so I pulled over and everything was fine. Drove a bit and still there.. got worse. Pulled out and took wheel off and found a big stone stuck in rear disc heat shield
    #5
  6. TM
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    TM S-line SB

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    I've had the same thing previously also, like others have mentioned its most likely a stone stuck between the heat shield! Horrible sound!
    #6

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