Wheel hub nut loosened | FerrariChat

Wheel hub nut loosened

Discussion in '348/355' started by F129b, Jul 21, 2016.

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  1. F129b

    F129b Formula Junior

    Feb 6, 2004
    523
    oc, calif.
    Full Name:
    Robert
    As I mentioned previously, my drivers side wheel hub nut was loose(!). BEWARE 355 bros!!!
    I am replacing it. It occurred to me that this wheel receives anti-torquing force unlike the pass side. Am I wrong in thinking this & that the boys in maranello should've put of "lefty tighty" on the drivers side hub nut to prevent??


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  2. itsablurr

    itsablurr Formula 3
    Silver Subscribed

    Dec 9, 2005
    1,016
    Carlisle, MA
    Full Name:
    Matt
    Was the hub stake nut staked?
     
  3. F129b

    F129b Formula Junior

    Feb 6, 2004
    523
    oc, calif.
    Full Name:
    Robert
    Yes. Far as I know it's factory-I've owned the car for 16 yrs. I'll back it all of the way and respond when I know for sure.


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  4. Dave rocks

    Dave rocks F1 World Champ
    BANNED

    Nov 23, 2012
    16,047
    Orchard Park, NY
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    Dave Lelonek
    Are you saying a lug bolt loosened or the hub nut? IIRC it's a torque spec of 208 FT IBS and a deformation of the nut.

    Or is the hub bearing done? If so, be prepared for $$$$$
     
  5. F129b

    F129b Formula Junior

    Feb 6, 2004
    523
    oc, calif.
    Full Name:
    Robert
    Hub nut


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  6. phrogs

    phrogs F1 Veteran
    Silver Subscribed

    Apr 13, 2004
    7,357
    Kzoo Michigan
    Damn usually takes me an impact gun, some pb blaster and some time to get them off.
     
  7. SeattleM5

    SeattleM5 Formula 3
    Rossa Subscribed

    Jul 9, 2006
    1,265
    Kirkland, Washington
    Full Name:
    Ettore Palazzo
    I was thinking the same thing! My first project after getting the 355 last year was to change the passenger inner CV boot. No way that nut was coming off without the help of "old faithful," my big fat impact gun.

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  8. F129b

    F129b Formula Junior

    Feb 6, 2004
    523
    oc, calif.
    Full Name:
    Robert
    I'm hearing y'all, but shouldn't it be reverse threaded ?


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  9. johnk...

    johnk... F1 World Champ
    Owner

    Jun 11, 2004
    11,276
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    John Kreskovsky
    No reason to be reverse threaded.
     
  10. Ricambi America

    Ricambi America F1 World Champ
    Sponsor Owner

    #10 Ricambi America, Jul 22, 2016
    Last edited by a moderator: Sep 7, 2017
    You know its funny.... Ferrari recently updated the manufacture of those hub nuts and we were talking about it at Ricambi America yesterday afternoon. The old ones were a crappy cast-looking nut (identified by the rough/bubbly looking surfaces). The new ones appear to be solid-machined.

    New nut on the top. Old nut on the bottom:
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  11. Dave rocks

    Dave rocks F1 World Champ
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    Nov 23, 2012
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  12. cf355

    cf355 F1 Rookie

    Feb 28, 2005
    4,208
    Full Name:
    chris
    +1


    properly torqued and staked .....there is no issue.
     
  13. F129b

    F129b Formula Junior

    Feb 6, 2004
    523
    oc, calif.
    Full Name:
    Robert
    Thanks for the link to your video dave. I'll do it like that!
     
  14. phrogs

    phrogs F1 Veteran
    Silver Subscribed

    Apr 13, 2004
    7,357
    Kzoo Michigan
    No.
     
  15. F129b

    F129b Formula Junior

    Feb 6, 2004
    523
    oc, calif.
    Full Name:
    Robert
    The drivers side hub nut was staked, but not as decisively as the pass side. Truthfully it may have corroded, but technique is important here.
    Upon further analysis, I do believe that reverse threading this part for load torquing on drivers side would've been the best engineering option. Beware(!) and check yours!! If mine would've failed and the hub come off, I don't need to itemize the poss consequences for you...
    My car is a 28k miles, 1998 GTS, well maintained and clean. I think this could happen to any bretherens vehicle. Check em'


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  16. F129b

    F129b Formula Junior

    Feb 6, 2004
    523
    oc, calif.
    Full Name:
    Robert
    And thanks to dave for his you tube video on doing this properly.
    Hub nut Torque = 203 ft/lbs


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