F355 C pillar cracking paint | FerrariChat

F355 C pillar cracking paint

Discussion in '348/355' started by pmotoring, Feb 25, 2014.

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  1. pmotoring

    pmotoring Formula Junior

    May 8, 2009
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    #1 pmotoring, Feb 25, 2014
    Last edited by a moderator: Sep 7, 2017
  2. pmotoring

    pmotoring Formula Junior

    May 8, 2009
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    PAT PAT
    #2 pmotoring, Feb 25, 2014
    Last edited by a moderator: Sep 7, 2017
  3. phrogs

    phrogs F1 Veteran
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    Apr 13, 2004
    7,348
    Kzoo Michigan
    Nothing special.

    I would go ahead and beef up the welds along that seam. Just add some spot welds along it. Grind them flat. Add your favorite filler and go from there for paint.
     
  4. F355steve

    F355steve Formula 3

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    Yup, adding spot welds is the key. Bradan, a sponsor here, has shown that fix in detail with lots of pictures. It might be hard to find but it is in one of there service threads a couple years ago.
     
  5. bobzdar

    bobzdar F1 Veteran

    Sep 22, 2008
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    Pete
    I've seen the whole seam welded from the underside to prevent it ever happening again. You pretty much have to do that during the major, though. If I ever address it on my car, that's when it will be.
     
  6. fatbillybob

    fatbillybob Two Time F1 World Champ
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    Does this only happen on berrlinettas? I have only seen this on those 348 or 355.
     
  7. F355steve

    F355steve Formula 3

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    My GTS has what looks like slight bubbling in the paint there right in the seam. Nothing bad yet.
     
  8. UConn Husky

    UConn Husky F1 Rookie

    Nov 11, 2006
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    common problem, I had mine fixed a few yrs back with welds...
     
  9. bigfatdog

    bigfatdog Rookie

    Dec 2, 2013
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    Fairly common on GTSs I've inspected over the years. The cracks are there if you look.
     
  10. driveitdaily

    driveitdaily Formula 3

    Jul 20, 2013
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    Sand blast it good before applying filler, it may look rust free , but it 's there , sandblasting will ensure you got rid of all rust, then primer it , don't leave bare metal for any amount of time as it immediately starts to oxidize


    " serenity now "
     
  11. pmotoring

    pmotoring Formula Junior

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    Great thanks for your tips, will ask my body shop to do the spot wield. Any guys can show some pics of how it should be wielded . Really appreciate for help.
     
  12. phrogs

    phrogs F1 Veteran
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  13. Dave rocks

    Dave rocks F1 World Champ
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    Wow, the amount of filler in the OP's photos is really alarming..
     
  14. fatbillybob

    fatbillybob Two Time F1 World Champ
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    So are the mig welds in the repair.
     
  15. F355steve

    F355steve Formula 3

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    What is more surprising is seeing a 50's - 60's Fcar stripped to the bare metal. Get it close with the metal and then shape it with body filler was the M.O. It was shocking the first time I saw one naked.
     
  16. cuneo

    cuneo Formula 3
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    Nov 20, 2006
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    Wow, these are extreme cases obviously. My 1995 355 GTB has C-pillar cracks but they are so thin and minor that a guy with good eye-sight won't see them until about 2 feet away. I have 50k miles on the car now after purchasing it with 25k! :) Will fix it at the next major.
     
  17. pmotoring

    pmotoring Formula Junior

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    Thanks for the info....

    By the way is the spot wield be necessary, my body shop said the metal behind are in very good shape..

    Spot wield just to prevent future cracks?
     
  18. phrogs

    phrogs F1 Veteran
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    Apr 13, 2004
    7,348
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    Yes the welds are adding strength to that weak spot, unless you want to see them fixing the cracks again in the future I'd have them do what's shown In those photos. It will add the strength it needs.
     

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