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430 Exhaust vibration/rattle

Discussion in '360/430' started by DrivnXcitment, May 7, 2021.

  1. DrivnXcitment

    DrivnXcitment Karting

    Apr 29, 2006
    82
    St. Augustine, FL
    Brain trust,
    My 05 spider has developed a bit of a rattle on the drivers side exhaust. It sounds tinny and I can eliminate the rattle by pressing down slightly on the exhaust tips, cat back area, etc. what can cause this and what are the remedies? I have aftermarket headers (not sure of the brand as they are wrapped and were there when I bought her), but stock cat back. I can’t see well enough in the engine bay to see the exhaust brackets or I’m not looking in the correct place. Thanks!
     
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  3. milanojess

    milanojess Karting

    Nov 26, 2007
    172
    sf bay area
    There are a few exhaust mounts that were prone to crack ( at least on the coupe, not certain if they use same attach ) mine for example had a cracked mount arm near the rear bumper
     
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  4. RedTaxi

    RedTaxi Formula 3
    Silver Subscribed

    Mar 1, 2012
    1,978
    New Zealand
    Full Name:
    Glen
    As above most likely a cracked/broken lower rear exhaust bracket. Best solution is simply remove them, your headers will love you for it. Most folk simply weld em up good and strong which your headers will hate you for.
     
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  5. DrivnXcitment

    DrivnXcitment Karting

    Apr 29, 2006
    82
    St. Augustine, FL
    I’m guessing you have to go in through the bottom to access those? Removing the diffuser?
     
  6. CoreyNJ

    CoreyNJ Formula Junior
    Silver Subscribed

    Apr 17, 2006
    776
    New Jersey Shore
    Could also be the exhaust valves rattling…
     
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  8. mike32

    mike32 F1 Rookie

    May 13, 2016
    3,654
    Uk
    Drop the diffuser and you can then see the mountings, probably one connected to the back of the gear box. Note diffuser allen screws are mixed lengths.
     
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  9. jag-oo-r

    jag-oo-r Formula Junior

    May 27, 2015
    387
  10. canivan74

    canivan74 Rookie

    Jun 27, 2020
    4
    Zurich, Switzerland
    could also be the outer skin of the tips.
    i solved it with 4 welding points. not very sexy but efficient. and i knew that i would go for a kline exhaust this spring, what already happened last week. :)

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  11. mike32

    mike32 F1 Rookie

    May 13, 2016
    3,654
    Uk
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  13. DrivnXcitment

    DrivnXcitment Karting

    Apr 29, 2006
    82
    St. Augustine, FL

    WOW! I'll definitely take a look at those when I get home. Thanks for sharing that. As far as the tips are concerned, at least that part I am 100% positive it is not that. I'll be crawling underneath and taking the diffuser off next week when I have some time.
     
  14. f355spider

    f355spider F1 World Champ
    Rossa Subscribed Owner

    May 29, 2001
    17,375
    USA
    You may also have aftermarket Capristo brackets installed, if they car is new to you and unknown changes. They can sometimes require some adjustment to eliminate buzzes or rattles.
     
  15. Spleen

    Spleen Rookie

    Mar 2, 2021
    46
    UK, West Berkshire
    Full Name:
    Spleen
    How do fix those, replacements? Mine are horrendous!
     
  16. mike32

    mike32 F1 Rookie

    May 13, 2016
    3,654
    Uk
    A trick is to attach a tension spring to the spindle to stop its rattle
     
  17. craze

    craze Formula Junior
    Silver Subscribed

    Mar 5, 2021
    340
    Full Name:
    Michael
    does anyone notice where the rear exhaust and after cats meet (one slides over the other and clamps) you can see marks on it where it expands and contracts??
     
  18. Spleen

    Spleen Rookie

    Mar 2, 2021
    46
    UK, West Berkshire
    Full Name:
    Spleen
    Thanks, I saw that previously but couldn’t get the bloody spring on! Anyway, car has gone over to GTO Engineering (UK) for them to have a look at as it’s got another niggle as well.
     
  19. mike32

    mike32 F1 Rookie

    May 13, 2016
    3,654
    Uk
    That should be coated in exhaust paste and not move at all
     
  20. futureferraribuyer

    futureferraribuyer Formula Junior

    Jun 23, 2010
    296
    My 2005 had the same problem due to the exhaust tip rattling inside the surrounding metal. Spot welding fixed the problem.
     
  21. DrivnXcitment

    DrivnXcitment Karting

    Apr 29, 2006
    82
    St. Augustine, FL
    Well I found the rattle. Took the diffuser off and staring me in the face was a broken exhaust bracket. Bracket is currently removed and awaiting my friend to weld it for me. Easy peasy. Thanks all!!

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  22. shifter

    shifter Formula Junior
    Silver Subscribed

    Apr 8, 2004
    573
    Danville, Ca
    Full Name:
    Joe
    You can also just eliminate that bracket. Welding it will put the stress back into your manifolds.


    Sent from my iPhone using FerrariChat
     
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  23. jag-oo-r

    jag-oo-r Formula Junior

    May 27, 2015
    387
    I hear this, but I don't understand it. Can you help us understand better? I don't see anything else supporting the exhaust is that's eliminated. So everything would literally be hanging on the exhaust manifolds.
    What am i missing?

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  24. RedTaxi

    RedTaxi Formula 3
    Silver Subscribed

    Mar 1, 2012
    1,978
    New Zealand
    Full Name:
    Glen
    There is an upper long "bow spring" that supports the weight of the muffler and rear pipes which allows the system to grow with heat and retract. The brackets stop this causing them and the headers to crack. The exhaust does not move or sag when you remove the lower brackets. The 360 does not have these brackets and has a much bigger heavier muffler.
     
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