Cayman S Another rear rattling noise (with sound)
Results 1 to 7 of 7

Thread: Another rear rattling noise (with sound)

  1. #1
    Join Date
    Jun 2019
    Location
    Netherlands
    Posts
    5
    Likes (Given)
    4
    Likes (Received)
    1
    Downloads
    0
    Uploads
    0

    Question Another rear rattling noise (with sound)

    Hi all,

    In the long series of mysterious rattles, please allow me to add the one in my 987.2 Maybe one of you knows what it is.

    Here it is (scroll to 55 seconds): https://www.dropbox.com/s/1741qgn36a...chtsachter.m4a
    If you hear somebody mumbling in a weird language, that's me, in Dutch

    The rattle only occurs at higher speeds (> 120 km/h or 70 mph).
    It is not affected by road-surface or RPM.
    It is not caused by the privacy screen or by the storage compartment, nor by the strut that holds up the trunk (verified that).


    The sound seems to originate from beneath the window behind the passenger seat.

    Weirdest thing: it has come and gone, and come back. I can't find a pattern...
    Last edited by hans987; 06-18-2019 at 03:29 PM.

  2. Remove Advertisements
     

  3. #2
    Join Date
    Jan 2014
    Location
    SoCal
    Posts
    828
    Likes (Given)
    79
    Likes (Received)
    189
    Downloads
    8
    Uploads
    0

    Re: Another rear rattling noise (with sound)

    I wonder if it has to do with the engine compartment fan? If the bearing is shot or the mount has broken or something like that, the airflow into the vent at high speed may cause a vibration.

  4. #3
    Join Date
    Dec 2015
    Location
    SF Bay Area, CA
    Posts
    126
    Likes (Given)
    0
    Likes (Received)
    22
    Downloads
    6
    Uploads
    0

    Re: Another rear rattling noise (with sound)

    The rear spoiler goes up at 70mph, right? Maybe something with the mechanism?

    Try manually extending the spoiler with the button and see if you can replicate the problem at lower speeds with the spoiler up.

  5. Remove Advertisements
    Planet-9.com
    Advertisements
     

  6. #4
    Join Date
    Jun 2019
    Location
    Netherlands
    Posts
    5
    Likes (Given)
    4
    Likes (Received)
    1
    Downloads
    0
    Uploads
    0

    Re: Another rear rattling noise (with sound)

    Good point, I have been looking for things related to airflow to check.
    Yours is another candidate.

  7. #5
    Join Date
    Jun 2019
    Location
    Netherlands
    Posts
    5
    Likes (Given)
    4
    Likes (Received)
    1
    Downloads
    0
    Uploads
    0

    Re: Another rear rattling noise (with sound)

    Quote Originally Posted by gubi View Post
    The rear spoiler goes up at 70mph, right? Maybe something with the mechanism?

    Try manually extending the spoiler with the button and see if you can replicate the problem at lower speeds with the spoiler up.
    Hadn't thought of this yet, indeed that is the speed at which it extends. I'll check that as well.

  8. #6
    Join Date
    Jun 2019
    Location
    Netherlands
    Posts
    5
    Likes (Given)
    4
    Likes (Received)
    1
    Downloads
    0
    Uploads
    0

    Re: Another rear rattling noise (with sound)

    Checked the vent and the spoiler to no avail. Tightened a nut holding the vent in place but it was barely loose.

    Any further input welcome, the saga continues
    Last edited by hans987; 06-21-2019 at 08:57 AM.

  9. #7
    Join Date
    Jun 2019
    Location
    Netherlands
    Posts
    5
    Likes (Given)
    4
    Likes (Received)
    1
    Downloads
    0
    Uploads
    0

    Re: Another rear rattling noise (with sound)

    Found it. As quite often with these things; it's really quite simple once you understand it It was the rear bumper part whose screw had come loose a bit and was flapping in the wind.

    Clip: https://www.dropbox.com/s/99o6kcj3lh..._7146.MOV?dl=0

  10. Remove Advertisements
     

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •