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Thread: Strange noise when hitting 65 Mph (not 88 Mph)

  1. #1
    Member
    Join Date:  Aug 2013

    Location:  Belgium

    Posts:    44

    My VIN:    5433

    Strange noise when hitting 65 Mph (not 88 Mph)

    When I hit 65-70 Mph a strange rattling noise occurs. To me it sounds if something is rattling against the windscreen. The noise keeps until I go above 85 Mph when it disappears. It was suggested that maybe the wheels needed to be balanced. I took the wheels to be balanced but sadly this didnít make any difference.

    I hope somebody can help or suggest what the problem could be.

    https://youtu.be/vj9VS2yZiSE

  2. #2
    Member
    Join Date:  May 2011

    Location:  Oklahoma

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    You could try disconnecting the Speedo cable from the lamda box

    Sent from my SM-G920R4 using Tapatalk

  3. #3
    Senior Member Dangermouse's Avatar
    Join Date:  May 2011

    Location:  Atlanta OTP GA

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    My VIN:    2743

    Club(s):   (SEDOC) (DCH) (DCUK) (DOC-UK)

    Do you feel any vibration in the steering wheel?
    Dermot
    VIN 2743, B/A, Frame 2227, engine 2320

    I don't always drive cars, but when I do, I prefer DeLoreans

    http://www.will-to-live.org

    No-one is to stone anyone, even, and I want to make this absolutely clear, even if they do say "carburetor"

  4. #4
    Member
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    I already disconnected the speedo cable, but alas.
    No vibrating at all from the steering wheel.

  5. #5
    Senior Member DrJeff's Avatar
    Join Date:  Feb 2012

    Location:  Houston TX

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    Noises in a speed range are rotational in source or resonance.

    A sound against the windscreen could be something resonating in the air at that speed, for example the cowling (screen cowl #105047) if not secured properly could at certain speed vibrate and knock again the windscreen.
    Jeff
    #6313 (lic: DMC-EV Texas), 25k miles, 100% leather, touchpad, 100% LED, dimmable LED dash, remote door lock & Elvis mod, all A/C vents in kneepads, wedgectomy, escutcheon velcro fix, GM door chimer, custom arm rest/storage/controls...

  6. #6
    Senior Member Bitsyncmaster's Avatar
    Join Date:  May 2011

    Location:  Leonardtown, MD

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    Quote Originally Posted by DrJeff View Post
    Noises in a speed range are rotational in source or resonance.

    A sound against the windscreen could be something resonating in the air at that speed, for example the cowling (screen cowl #105047) if not secured properly could at certain speed vibrate and knock again the windscreen.
    Try temporarily removing the wipers.
    Dave M vin 03572
    http://dm-eng.weebly.com/

  7. #7
    Member
    Join Date:  May 2013

    Location:  Richmond Va.

    Posts:    81

    That loud sounds like in the cab.

    Steve

  8. #8
    Member Blackie's Avatar
    Join Date:  May 2011

    Location:  Australia

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    My VIN:    1919

    Fold up a piece of paper and jam it in between the windscreen and the top black finisher panel then test drive. Mine was doing the same thing and that's what it was, need to re-adjust the panel. Only did it at a certain speed.
    Paul Black - Vin 1919

  9. #9
    Senior Member DMC-81's Avatar
    Join Date:  Apr 2014

    Location:  Florida

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    Quote Originally Posted by Blackie View Post
    Fold up a piece of paper and jam it in between the windscreen and the top black finisher panel then test drive. Mine was doing the same thing and that's what it was, need to re-adjust the panel. Only did it at a certain speed.
    My money is on this cause. Mine was loose, and I discovered that it was missing the foam weatherstripping (108632). The lack of foam allowed the finisher's metal tabs to click against the SS retainer. Once I installed the foam, it was tight. Here are a couple pics to illustrate:

    Underside of finisher panel
    image.jpeg
    Retainer
    image.jpeg
    Foam
    image.jpeg
    Installed
    image.jpeg
    Dana

    Delorean status: CECF 2017 Platinum Award winner. Still tinkering...

    Pictures and comments of my restoration journey are in the albums section on my profile.

    .

  10. #10
    Senior Member DMC-81's Avatar
    Join Date:  Apr 2014

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    Quote Originally Posted by DMC-81 View Post
    My money is on this cause. Mine was loose, and I discovered that it was missing the foam weatherstripping (108632). The lack of foam allowed the finisher's metal tabs to click against the SS retainer. Once I installed the foam, it was tight. Here are a couple pics to illustrate:

    Underside of finisher panel
    image.jpeg
    Retainer
    image.jpeg
    Foam
    image.jpeg
    Installed
    image.jpeg
    Sorry, the part number is 106852.
    Dana

    Delorean status: CECF 2017 Platinum Award winner. Still tinkering...

    Pictures and comments of my restoration journey are in the albums section on my profile.

    .

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