Torque Spec on Belt Tensioner Bolt | FerrariChat
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Torque Spec on Belt Tensioner Bolt

Discussion in '308/328' started by 328GTB, Oct 29, 2006.

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  1. 328GTB

    328GTB Formula Junior

    Jun 4, 2002
    305
    Texas, USA
    Full Name:
    Carmine
    #1 328GTB, Oct 29, 2006
    Last edited by a moderator: Sep 7, 2017
  2. Rifledriver

    Rifledriver Three Time F1 World Champ

    Apr 29, 2004
    37,099
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    Brian Crall
    #2 Rifledriver, Oct 29, 2006
    That is a 12mm bolt.
     
  3. GTHill

    GTHill F1 World Champ
    Lifetime Rossa Owner

    Jul 1, 2006
    14,054
    Double Wide
    Full Name:
    GT Hill
    #3 GTHill, Oct 30, 2006
    He's talking about the 19mm Tensioner bolt (I think).

    Gene
     
  4. 328GTB

    328GTB Formula Junior

    Jun 4, 2002
    305
    Texas, USA
    Full Name:
    Carmine
    #4 328GTB, Oct 30, 2006
    Yes, that's the bold that holds the tension on the bearing. I need to know its torque spec.

    Thanks
     
  5. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
    Lifetime Rossa

    Jan 11, 2001
    26,800
    30°30'40" N 97°35'41" W (Texas)
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    Steve Magnusson
    #5 Steve Magnusson, Oct 30, 2006
    You are all talking about the same bolt -- it is a 12mm bolt with a 19mm hex head (using your numbers).

    What model?

    The 308GT4 WSM has:

    "Nut for timing belt stretcher"
    "12 x 1,25" (the thread size = bolt size)
    "6,6 Kgm" (48 ft-lb)

    In the TR WSM, they improved the translation ;), and for the same thread size they give "5.6 daNm" (41.2 ft-lb).
     
  6. junkyarddog

    junkyarddog Formula Junior

    May 18, 2006
    353
    Palatka, FL
    Full Name:
    Kelly Lake
    #6 junkyarddog, Oct 30, 2006
  7. 328GTB

    328GTB Formula Junior

    Jun 4, 2002
    305
    Texas, USA
    Full Name:
    Carmine
    #7 328GTB, Oct 30, 2006
    Steve, the model is a 328 US version.
     
  8. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
    Lifetime Rossa

    Jan 11, 2001
    26,800
    30°30'40" N 97°35'41" W (Texas)
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    Steve Magnusson
    #8 Steve Magnusson, Oct 30, 2006
    The 308QV/328 Workshop Manual (that you can get at Steve Jenkin's site in .pdf) gives the same (later) value as the TR WSM -- 5,6 daNm (41.2 ft-lb)
     
  9. 328GTB

    328GTB Formula Junior

    Jun 4, 2002
    305
    Texas, USA
    Full Name:
    Carmine
    #9 328GTB, Oct 30, 2006
    Excellent! Thank You!

    Steve, do you know if the cam belts are date coded? If so, do know how to decypher? See http://ferrarichat.com/forum/showthread.php?t=126966
     
  10. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
    Lifetime Rossa

    Jan 11, 2001
    26,800
    30°30'40" N 97°35'41" W (Texas)
    Full Name:
    Steve Magnusson
    #10 Steve Magnusson, Oct 30, 2006
    No, I've got nothing specific on that other than a foggy recollection that the subject has come up here before.
     

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