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Exhaust rattle when cold

Discussion in '360/430' started by Kingkitesurf, Jul 29, 2020.

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  1. Kingkitesurf

    Kingkitesurf Rookie

    Nov 22, 2015
    7
    Netherlands
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    Job
    #1 Kingkitesurf, Jul 29, 2020
    What can it be if my F430 on cold start up has a rattling resonating sound in the exhaust. Once warmed a bit it disappears. After that you can only hear this at deceleration... Like something is loose ... any ideas or experience?
     
  2. ridege55

    ridege55 Formula 3
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    May 9, 2017
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    Manhattan Beach, CA
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    John
    #2 ridege55, Jul 29, 2020
    Sounds like either the lower exhaust brackets might be cracked/vibrating or valved exhaust flaps. Usually when the metal gets warmed up, the sound goes away or decreases.
     
  3. van22

    van22 Karting
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    Aug 7, 2005
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    VAN C
    #3 van22, Jul 29, 2020
    Check studs on headers that was my issue, one was broken.
     
  4. Kingkitesurf

    Kingkitesurf Rookie

    Nov 22, 2015
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    #4 Kingkitesurf, Jul 30, 2020
    Is this the issue we are all warned about... broken headers that weld pieces can get sucked into the engine and you are f*cked. This car has the new headers as it is Dec 2008 production.
     
  5. Danedingerson

    Danedingerson Karting

    Dec 26, 2011
    236
    Maui
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    Dane
    #5 Danedingerson, Jul 30, 2020
    Not weld pieces. The stuffing from the cat converter is in the header.Looks like white threads. Mine does the same noise. It is the broken exhaust bracket, likely. I plan to remove them both.
     
  6. van22

    van22 Karting
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    Aug 7, 2005
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    #6 van22, Jul 31, 2020
    Same here broken stud!
     

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