Question on 348 Clutch Thickness | FerrariChat
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Question on 348 Clutch Thickness

Discussion in 'Technical Q&A' started by Brewman, Mar 25, 2014.

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  1. Brewman

    Brewman Formula Junior

    Apr 3, 2012
    417
    NC Mountains @ Boone
    Full Name:
    Joe
    #1 Brewman, Mar 25, 2014
    In searching this forum and WSM I am seeing different specs on the unleaded clutch thickness for my 94 348. Generally I'm finding either 7.3-7.4 mm or 7.7+-.3 mm. I believe the latter number is correct but would like confirmation before having the disc relined.

    Thanks for your help.

    Brewman
     
  2. ernie

    ernie Two Time F1 World Champ
    Lifetime Rossa Owner

    Nov 19, 2001
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    The Bad Guy
    #2 ernie, Mar 25, 2014
    I don't have the specs for a single clutch, but try hitting up fchatter maddog.
     
  3. Brewman

    Brewman Formula Junior

    Apr 3, 2012
    417
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    Full Name:
    Joe
    #3 Brewman, Mar 25, 2014
    Thanks Ernie, will send maddog a PM.

    Brewman
     
  4. garybobileff

    garybobileff Formula 3
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    #4 garybobileff, Mar 25, 2014
    Per the Ferrari shop manual, dual disc is 7.25MM, with 1.5 Mm wear limit, single disc is 8.3 MM
    Gary Bobileff
     
  5. Brewman

    Brewman Formula Junior

    Apr 3, 2012
    417
    NC Mountains @ Boone
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    Joe
    #5 Brewman, Mar 26, 2014

    Hi Gary,

    Thanks for replying. Can you give me the page number in the WSM you are getting this data from. I downloaded the WSM from all ferraridocs. In there the spec for a single disc is 7.7 mm at rest.

    This is why I am confused. There seems to be several specs out there. I'm getting the disc relined and want to make sure I go back to the correct thickness.

    Thanks,

    Brewman
     
  6. garybobileff

    garybobileff Formula 3
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    #6 garybobileff, Mar 26, 2014
    The single disc thickness is my hand written note in the manual by measuring a new single disc for future reference. I know that the measurement is truly correct.
    Gary Bobileff
     
  7. fatbillybob

    fatbillybob Two Time F1 World Champ
    Consultant Owner

    Aug 10, 2002
    28,981
    socal
    #7 fatbillybob, Mar 26, 2014
    The confusion may come from the Marcel spring in the disc. Therefore there is a compressed and uncompressed thickness spec.. last I remember it was in the wsm. If not....Gary what is the spec compressed vs. Uncompressed?
     
  8. garybobileff

    garybobileff Formula 3
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    #8 garybobileff, Mar 26, 2014
    I only measured a new disc, uncompressed.
    Gary Bobileff
     
  9. Brewman

    Brewman Formula Junior

    Apr 3, 2012
    417
    NC Mountains @ Boone
    Full Name:
    Joe
    #9 Brewman, Mar 26, 2014
    Gary and FBB thanks for responding. I'm wondering if the difference between the WSM (7.7 MM) uncompressed and Gary's measurement could be due to which of two clutches Ferrari installed, either Valeo ( what I have) or I think the second version might be AP but not sure.

    Gary do you know which clutch you measured and what model year were you dealing with ?

    Thanks,

    Brewman
     
  10. garybobileff

    garybobileff Formula 3
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    Feb 5, 2004
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    #10 garybobileff, Mar 26, 2014
    Honestly. I don't have a clue. We service about 400 cars a year, so, my memory fades!
    Gary Bobileff
     
  11. Brewman

    Brewman Formula Junior

    Apr 3, 2012
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    NC Mountains @ Boone
    Full Name:
    Joe
    #11 Brewman, Mar 26, 2014
    Thanks Gary. Appreciate your assistance.

    Brewman
     

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