458 “Knock knock” sound | FerrariChat

458 “Knock knock” sound

Discussion in '458 Italia/488/F8' started by Ggear, May 31, 2018.

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  1. Ggear

    Ggear Rookie

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    Hi All,

    Anyone experience a “knock knock” sound intermittently from the rear of their 458? Don’t think it’s a loose part as the sound doesn’t always occur when I hit bumps. Also, the “knock knock” sound has the same rhythm every time. Please see the attachment for a video of the sound.
    Thanks for your help.




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    Ggear, May 31, 2018
    #1
  2. Dilusha

    Dilusha Formula Junior

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    When this happens, you have to ask, who's there? Then your Ferrari will come up with a joke to make you laugh!

    Ferraris are awesome! :)
     
    Dilusha, May 31, 2018
    #2
    Ggear likes this.
  3. SVCalifornia

    SVCalifornia F1 Rookie Rossa Subscribed

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    Standard exhaust components??

    SV


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    SVCalifornia, May 31, 2018
    #3
  4. Ggear

    Ggear Rookie

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    Correct, car is fully stock.


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    Ggear, May 31, 2018
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  5. Ggear

    Ggear Rookie

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    I’d like to add that the sound is quieter from the driver’s seat compared to the video.


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    Ggear, May 31, 2018
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  6. MuratC

    MuratC Formula Junior

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    Something seems to be loose. Most likely some part of exhaust system
     
    MuratC, May 31, 2018
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  7. Ggear

    Ggear Rookie

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    If something is loose, wouldn’t it make that sound every time I hit a bump? The sound seems to occur randomly (even when the road is flat) and it is ALWAYS that same rhythm “knock knock”.


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    Ggear, May 31, 2018
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  8. MuratC

    MuratC Formula Junior

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    In that case no one here can comment unless they are in the car with you. Better take it to the dealer and let them find out
     
    MuratC, May 31, 2018
    #8
  9. vincep99

    vincep99 Formula 3 Owner Silver Subscribed

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    Agree with MuratC, dealer may know.
     
    vincep99, May 31, 2018
    #9
  10. TheDiffuser

    TheDiffuser Formula Junior

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    That sounds more like switchgear/electrical? Does the sound occur while the car is stationary, idling and in neutral?


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    TheDiffuser, May 31, 2018
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  11. Ggear

    Ggear Rookie

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    Yes I believe I have heard it while stationary, idling, and in neutral.


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    Ggear, May 31, 2018
    #11
  12. TheDiffuser

    TheDiffuser Formula Junior

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    Very difficult to tell from your video. I recently had a similar knocking sound. Took car to F dealer. Sound at idle wasn't the faint 'ticking' injector sounds, it was a lower tone, quieter, knocking/rattle type sound. More of a sound under the normal engine idle noise.
    Turned out it was a standard 458 noise. The tech really had to listen hard. Then he started up two other 458 cars. Sure enough, I heard the same sound.
    No action required. Just my experience.


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    TheDiffuser, Jun 1, 2018
    #12
  13. Tides

    Tides Karting

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    You might want to check out the transmission drive shafts and the cvj’s. - just had one replaced due to intermittent knocking sounds that were in time with revolution of road wheel


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    Tides, Jun 1, 2018
    #13

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