458 - How do I get seized bolt out of cat/header V-band clamp? *pics* | FerrariChat

458 How do I get seized bolt out of cat/header V-band clamp? *pics*

Discussion in '458 Italia/488/F8' started by FerrariCognoscenti, Sep 18, 2022.

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  1. FerrariCognoscenti

    FerrariCognoscenti Formula 3

    Jan 19, 2021
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    #1 FerrariCognoscenti, Sep 18, 2022
    Was trying to unscrew the bolt on the v-band that connects the header to the cat and the bolt head sheared right off and the bolt is seized in the v-band.

    I tried vice grips to just twist it out, but the v-band aluminum is so soft that it twists so easily. I sprayed the bolt with some penetrating oil but didn’t help at all.

    Any help is appreciated

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  2. wthensler

    wthensler F1 Rookie
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    #2 wthensler, Sep 18, 2022
    Double nut it. That is, find two nuts which fit the thread pattern and screw them close to the collar, one at a time, till they are together. Then try unscrewing the one closest to the aluminum collar out. When it hits the outermost nut, the sheared bolt should back out.

    That should work, but failing that, perhaps buy a new collar?

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  3. mdrums

    mdrums Formula 3
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    #3 mdrums, Sep 18, 2022
    Yep just buy a new collar.
     
    LagunaSecaMike likes this.
  4. FerrariCognoscenti

    FerrariCognoscenti Formula 3

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    #4 FerrariCognoscenti, Sep 18, 2022
    Many thanks guys. Ended up breaking the V band in the process, so need a new one.

    Anyone know the part number?

    Or better yet, anyone know the specific size so maybe I can find one locally at an auto parts store instead of needing to buy one?
     
  5. FerrariCognoscenti

    FerrariCognoscenti Formula 3

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    #5 FerrariCognoscenti, Sep 18, 2022
    It is a 4 inch v-band clamp. Does anyone know what type of store would have this in stock in a town? Would like to buy tomorrow and. It delay my car being down for ordering it online and waiting.


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  6. SeattleStew

    SeattleStew Formula Junior
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    #6 SeattleStew, Sep 19, 2022
    Napa or an exhaust shop would be my first thought. You’ll have to make sure that the clamp fits the flanges correctly, and the bolt will probably be a T-bolt instead of the OEM style
     
  7. ekosan

    ekosan Karting

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    #7 ekosan, Sep 19, 2022
  8. Giallo27

    Giallo27 Karting
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    #8 Giallo27, Sep 19, 2022
    Replace these clamps with lambo huracán’s, they are direct fitting and way much better, actually they have a spring to compensate over tighten when heated.


    Enviado desde mi iPhone utilizando FerrariChat
     
  9. FerrariCognoscenti

    FerrariCognoscenti Formula 3

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    #9 FerrariCognoscenti, Sep 19, 2022
    Wow great idea. Do you have a Lambo part number?
     
  10. Solid State

    Solid State F1 Veteran
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    #10 Solid State, Sep 20, 2022
    This is typical and why I hate exhaust work. Turbos must be horrendous.
     
  11. Giallo27

    Giallo27 Karting
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    #11 Giallo27, Sep 22, 2022
    420251143


    Enviado desde mi iPhone utilizando FerrariChat
     
  12. Eric C

    Eric C F1 Veteran
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    #12 Eric C, Sep 22, 2022
    You need to go to a diesel shop to find the correct VBAND if you want one locally. Bring it with you so they can match it up.
     
  13. mike32

    mike32 F1 Veteran

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    #13 mike32, Sep 24, 2022
    If you get the same again, best to drill it out, starting with say a 3 mm drill and keep going bigger,
     

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