lound clunk on start up after releasing brakes.

Discussion in 'Gen 3 Prius Main Forum' started by jayl, Oct 1, 2012.

  1. jayl

    jayl Junior Member

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    I have a 2010 prius 2;

    This morning after starting the car and releasing the brakes I heard loud clunking sound (seemed like a belt ?) Turned the car off. tried it again exact same thing, turned if off .. opened the hood to see if I can tell where this was coming from.. started the car and the clunking came for <1 sec and went away, car drove fine brakes worked fine..

    Anyone else had this happen to them?

    I read something regarding temp changes we have had some change but not a drastic change, and the car was driven over the weekend.

    Thanks,
    Jay
     
    #1 jayl, Oct 1, 2012
  2. spiderman

    spiderman wretched

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    First thing that comes to mind is rust on the rotors holding the pads. Did you wash the car this weekend? Was it really humid?
     
    #2 spiderman, Oct 1, 2012
  3. jayl

    jayl Junior Member

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    #3 jayl, Oct 1, 2012
  4. Metalman

    Metalman Member

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    I heard a loud clunking (rattling) sound when the Prius was started for the first time in five months. There was something in a thread about the intake manifold. However, after hearing the noise only twice (first two start ups) it hadn't occurred again and therefore I haven't been concerned about it.
    Has it made the same noise again?
     
    #4 Metalman, Oct 1, 2012
  5. spiderman

    spiderman wretched

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    So was this when the engine started or when you released the brakes or both I suppose?
     
    #5 spiderman, Oct 1, 2012
  6. jayl

    jayl Junior Member

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    both, after engine started, released the brakes and it started..
     
    #6 jayl, Oct 1, 2012
  7. jayl

    jayl Junior Member

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    will know this afternoon / and evening and tomorrow am.
     
    #7 jayl, Oct 1, 2012
  8. jayl

    jayl Junior Member

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    so it didnt happen again in the afternoon.
     
    #8 jayl, Oct 1, 2012
  9. Texas-Prius

    Texas-Prius One more Prius to fight terrorism

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    I too usually make a loud clunking sound when I first get out of bed.

    - TP
     
    #9 Texas-Prius, Oct 2, 2012
  10. David Beale

    David Beale Senior Member

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    The clunking sound is an engine issue, not a brake issue. Report it to your dealer. There is a TSB on it. It -is- possible the brakes can rust to the pads, but it's not common in the Prius. With Prius brakes you get a rubbing sandpaper noise when the rotors rust from getting wet and sitting overnight. It goes away when you move about 20 ft or so.
     
    #10 David Beale, Oct 3, 2012
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