clutch noise | FerrariChat

clutch noise

Discussion in '348/355' started by Ben348, Jan 22, 2008.

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  1. Ben348

    Ben348 Formula Junior

    Jan 1, 2008
    304
    NH the Netherlands
    Full Name:
    Ben
    I`ve got one for you nutters:

    If I press the clutch I can hear a ,sort of, grinding sound from the rear. After releasing the clutch the noise is gone. It has the kind of feel to it as a Ducati clutch: not disturbing yet anoiing... It has a cheap feel to it.
    The other 5 348`s (1990) I eye-balled where silent.
    So, as any grease monkey would do, I yanked of the clutch pumkin (who ever came up with that discription?) broke the tiny little pin, and found nothing to be wrong...
    The throw out bearing feels sollid, a bit of oil coming from the 3 O-rings (in replacing proces) and that is that!
    Need I dig deaper and dismantle the dubble plates, or stop messing around and get used to an extra sound?

    ( the car should have a new clutch plate, according to the seller, and it drove just 2000km in 3 years. And, Yes the sound is slightly fading/changing)

    Yentleman, may I have your votes please?

    Kind regards,

    Ben
     
  2. Ricambi America

    Ricambi America F1 World Champ
    Sponsor Owner

    In my very amateur opinion, the grinding sound is not normal. Check the thrust bearing, check the big fat bearing at the rear of the pumpkin, perhaps the intermediate rings in the clutch itself. Loss of flywheel grease through triple seals could also be a telltale sign that the sound is deeper in the assembly than you've reached.
     
  3. vvassallo

    vvassallo F1 Veteran

    Aug 4, 2006
    8,329
    Palos Verdes
    Full Name:
    Vince V
    First thing I'd say is TO bearing. After that, who knows? If the packing grease is failing, that would give u a wobble I think, not a grinding. Could be that. As Daniel said, grinding bad.
     
  4. ernie

    ernie Two Time F1 World Champ
    Lifetime Rossa Owner

    Nov 19, 2001
    22,620
    The Brickyard
    Full Name:
    The Bad Guy
    That would be fatbillybob.
     
  5. f355spider

    f355spider F1 World Champ
    Owner Rossa Subscribed

    May 29, 2001
    18,054
    USA
    You could try regreasing the bearing in the clutch cover (pumpkin) or just replace it. My car made a similar noise after a clutch replacement, it was the bearing in the cover.
     
  6. Ben348

    Ben348 Formula Junior

    Jan 1, 2008
    304
    NH the Netherlands
    Full Name:
    Ben


    Great idea: I`ll ripp the needle out of my arm, and shoot some 9melted-) grease in the outer bearing. If it is a fix, I`ll replace it later...

    regards,Ben
     
  7. fatbillybob

    fatbillybob Two Time F1 World Champ
    Consultant Owner

    Aug 10, 2002
    29,223
    socal
    Noise that sound like a T/O bearing when you are sure the T/o bearing and PP are good is the clutch shaft gear banging on the transfer gears to the pinion shaft. This could require a gearbox teardown. You can determine this by ear with a mechanics stethscope placed on the area where the input and output clutch fluid zone is on top of the gearbox. You can verify by taking the clutch shaft out of the gearbox and inspecting the gears there and the condition of the clutch shaft lock ring which will be loose if the gears are grinding here.
     
  8. Ben348

    Ben348 Formula Junior

    Jan 1, 2008
    304
    NH the Netherlands
    Full Name:
    Ben
    gents,

    I have regreased the end bearing. Unfortunately I also have broken the throwoutbearingpin-thingy (scrabble?)
    Since the tripple seals and the tiny pin have not yet arrived, I`m doomed to cleaning and polishing... It`s not shiny as you-know-how`s, but I am getting there!
    Ones done, I`ll shoot some pics.

    Thanks for the info!
    Ben.
     

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