TMC is an independent, primarily volunteer organization that relies on ad revenue to cover its operating costs. Please consider whitelisting TMC on your ad blocker or making a Paypal contribution here: paypal.me/SupportTMC

New noise after shutoff.. (The Cooing)

Discussion in 'Roadster' started by Panicopticon, Aug 28, 2015.

  1. Panicopticon

    Panicopticon Member

    Joined:
    May 24, 2014
    Messages:
    125
    Location:
    Syracuse, NY, USA
    For the last day or three the Roadster has been making a new noise after shutdown. Takes a minute to a minute and a half after turn off to start, it slowly rises in volume and then stops. I'd call it a cyclic ping, cooing, or chirp sound. The sound is definitely louder in person, but not significantly. The first time I didn't realize it was the car.

    Doesn't seem to depend on how long the car is on/distance. Coolant levels are good, pump is running normally, nothing seems out of whack in the rear end. Car is driving and running fine, no warnings in diagnostic mode (should dump the logs and check them). Doesn't seem to happen when the car is running, but there is enough other noise that it would be hard to tell. The car was at Tesla for its yearly only 2 months ago. My best guess is a cooling fan bearing beginning to fail -- I hope I'm wrong, also it doesn't seem like the fans are really spinning when I hear it.



    Anyone had similar symptoms or have any thoughts?

    Thanks!
     
  2. Jaff

    Jaff Active Member

    Joined:
    Aug 15, 2010
    Messages:
    3,007
    Location:
    Grimsby, Canada
    Sounds like it's contentedly purring...:confused:

    Sorry, but I've never heard my Roadster make any noise like this.
     
  3. ChadS

    ChadS Petroleum is for sissies

    Joined:
    Jul 16, 2009
    Messages:
    2,401
    I have never heard this either.

    I listened before reading your guess...and that was my guess too. It sounds like a fan that has something loose or out of round. Hard to tell much from a recording though.

    Good luck.
     
  4. Panicopticon

    Panicopticon Member

    Joined:
    May 24, 2014
    Messages:
    125
    Location:
    Syracuse, NY, USA
    I should add that I can localize it to the rear end. The recording was made with the phone sitting in the trunk.
     
  5. wiztecy

    wiztecy Active Member

    Joined:
    Apr 29, 2012
    Messages:
    2,721
    Location:
    Santa Cruz, California, United States
    My best guess would be either one of the fans in side the PEM is dirty around the bearing or the bearing itself is starting to go. You can look at a pic of an opened 2.x pic to determine if there's a fan in that particular location of the PEM.
     
  6. Panicopticon

    Panicopticon Member

    Joined:
    May 24, 2014
    Messages:
    125
    Location:
    Syracuse, NY, USA
    Quick update, was a PEM fan bearing. Sadly they had to replace the entire fan assembly. Previously I had the dual motor, dual fan arrangement. I opted for the newer dual fan single motor system. This upgrade involved swapping the rear sway bar as well, which means I now have the adjustable one. Total cost was ~$1600. Kept the old parts as spares. I can snap some photos if people are curious.
     
  7. BartJ

    BartJ Member

    Joined:
    Dec 13, 2014
    Messages:
    279
    Location:
    Belgium
    does that mean that all roadster that are equipped with the dual fan single motor system, automatically have an adjustable rear sway bar ?
    How can I tell if my mine is adjustable ?
     
  8. ernst

    ernst 't is een grijze.

    Joined:
    Nov 1, 2010
    Messages:
    34
    You can tell it by the 3 holes on the ends of sway bar where its connected to the suspension studs. Also the sport suspension upgrade includes, besides the front, the adjustable shocks as well.
     
  9. m0rph

    m0rph Member

    Joined:
    Nov 20, 2014
    Messages:
    488
    Location:
    Belgium
    I removed it to clean the fans, and it's not adjustable.
     
  10. wiztecy

    wiztecy Active Member

    Joined:
    Apr 29, 2012
    Messages:
    2,721
    Location:
    Santa Cruz, California, United States
    If you you don't have the 3 holes in the swaybar, you won't/don't have the upgraded blower.
     

Share This Page