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banging on roof

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by GPW, Apr 17, 2012.

  1. GPW

    GPW New Member

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    2006 Prius
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    My wife and I just completed a 1k-mile trip yesterday, and during our 65-70 mph drive we heard a frightening banging on our roof. Both of us thought someone had dropped large stones from an overpass. There were maybe 5 bangs, then a pause for a minute, and another 3 bangs. All were loud enough that we feared something would come through the roof.

    When we were able to stop and look, there were no marks, no change in the roof at all.

    We've never heard the sound before. It didn't happen again in the remaining 300 miles home. It was a hot day, 90 degrees, and we had air conditioning on.

    My only theory was that the roof was reacting to the heat. But it's not convincing, even to me.

    Anyone else had this happen?
     
    #1 GPW, Apr 17, 2012
  2. qbee42

    qbee42 My other car is a boat

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    Northern Michigan
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    Any reports of hit and run pedestrian accidents in the area?

    :D

    Tom
     
    #2 qbee42, Apr 17, 2012
  3. jabecker

    jabecker driver of Prii since 2005

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    The alien's tractor beam kept slipping? :D
     
    #3 jabecker, Apr 17, 2012
  4. bisco

    bisco cookie crumbler

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    how long did it last?
     
    #4 bisco, Apr 17, 2012
  5. Fore

    Fore Don't look back!

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    Possibly cabin pressure metal expansion?
     
    #5 Fore, Apr 17, 2012
  6. HaveNoCents

    HaveNoCents Conservative Tree Hugger

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    I bet Stephen King knows what it was.
     
    #6 HaveNoCents, Apr 17, 2012
  7. Big Steve

    Big Steve ramblin wreck

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    Remember that ground banging in the Midwest a few weeks ago?... Just sayin'
     
    #7 Big Steve, Apr 17, 2012
  8. 2004priusgal

    2004priusgal Junior Member

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    Location:
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    2004 Prius
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    Upgrade
    had this happen 3 separate times whole on highway in nj...
    my brother said probably acorns... night time, no roof marks,
    2004 176k. ???
     
    #8 2004priusgal, Oct 12, 2020
  9. ILuvMyPriusToo

    ILuvMyPriusToo Senior Member

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    Vehicle:
    2009 Prius
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    II
    I have had an acorn drop on my roof, and it made quite a bang. But I was driving under an oak tree at the time . . .
     
    #9 ILuvMyPriusToo, Oct 12, 2020
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