355 F1 Leak and Clutch inquiry | FerrariChat

355 F1 Leak and Clutch inquiry

Discussion in 'Technical Q&A' started by stason, Mar 8, 2006.

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  1. stason

    stason Rookie

    Mar 8, 2006
    9
    My 355 is a 1999 F1 spider. I am getting ready to put in another clutch. I had replaced it roughly 10,000 miles prior. I believe the rapid ware was due to the grease coming loose from within the flywheel and destroying the clutch material (is this correct?). This time around I will need to repack it. I have never performed this procedure before but have reviewed your January 2005 thread regarding the 355 flywheel and am ready to tackle it. I will open and clean the flywheel and pack it with 230 grams of grease; then reseal it with a do-it-yourself McMaster O-ring (is this correct? any other tips?). What kind of grease does the flywheel require?

    My second issue, and main question, is a leak. I have an F1 fluid leak coming from, it seems, within the main clutch housing. It appears to be dripping through the bottom vent of this housing. It is a fast leak as a majority of the system’s F1 fluid appears on the floor overnight. A few hours leaves a good 12 inch puddle. Is this as simple as replacing a seal or two – or is this a throw-out bearing problem – or something else? Seems serious. What will I need to prepare for and purchase (specific seals, tools) for this problem while I’m in there replacing the clutch?

    My third set of questions returns to the clutch. My previous clutch kit included the pressure plate and cost over $800. Now that I have 2 worn clutch plates and 2 pressure plates, is there a store I may trade these parts in for 1 discounted new set? If not, where do you recommend I buy the new parts from? I was also interested in getting a different type of clutch. After doing some research and reviewing your threads I don’t have much hope; but are there any aftermarket clutches or otherwise that will perform better (more grippy, wares less, designed for longer periods of aggressive driving)? I also need a clutch alignment tool. I borrowed the last one and am not sure if I can get it again. Any cheaper solutions or tools than the one I found online for $100? Last thing! After everything is reassembled I remember needing to have the F1 system calibrated for the new clutch. Is there another solution rather than paying the dealer a quoted $390 for this task?

    Sorry for the essay! I truly appreciate any of your help.
     
  2. pino

    pino Karting

    Nov 1, 2003
    208
    South Central PA
    Seems like your throw-out bearing is leaking fluid through one of the seals.
    The throw-out bearing is activated with the F1 system fluid, unlike a normal 6-speed which uses fluid from the brake resevoir. If you have never had the throw-out bearing replaced, the replacement is the same part as the 360 model. Unfortunately, you may also need the support flange the bearing rides on. A rather big dollar item. You may be able to get away with just renewing the seals of your old throw-out bearing instead of replacing it with a new one, but this will have to wait for disassembly to determine if the conditions will allow it. You may just want to have the new parts installed to avoid a potential problem later.


    To maximize the operation of the F1, as well as prolong proper clutch engagement and life, this step will also be necessary. Also bleeding the hydraulic system is impossible without the SD2.
     
  3. chaa

    chaa F1 Veteran

    Mar 21, 2003
    5,058
    #3 chaa, Mar 8, 2006
    Last edited by a moderator: Sep 7, 2017
    No doubt ya read about my replacement of the throw out bearing just a little way down this very thread. Cant see that you would need a support flange though. It includes pictures of my old blown out bearing, along with a new uprated bearing, and shows the seals on th inside.
    MB: Bellow you can see the support flange, the bearing sits on this and slides up and down the shaft. Thre is a small bracket that stops the bearing from comming of the shaft, this bracket holds the whole bearing on and is held on by two 8mm bolts at the top (picture wit the top red arrows). Also shown is the bleed nipple, and the two fluid holes on the shaft its self. The whole job of taking of the bumper,exhaust,clutch/plate took me about one hour, the beaing its self takes about 5 minuets to change. Hope this may help ya dude:)
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  4. ferrarioldman

    ferrarioldman Formula 3
    Professional Ferrari Technician Silver Subscribed

    Jun 19, 2002
    1,033
    Summerfield, NC
    Full Name:
    Tom Jones
    The 6 speed release bearing and the F1 are different Chaa. There are 3 guide pins plus a position sensor to deal with. If your bearing is good, you can replace the seals only. You can get the disc by itself if your PP is OK. I believe that I have read that Ferrari of Costa Mesa has a Kevlar disc available. You can bleed the slave without the SD2 but to set the wear to zero you will need the SD2. You should also replace the triple seals on the input shaft and the O-ring on the clutch shaft.
     
  5. pino

    pino Karting

    Nov 1, 2003
    208
    South Central PA
    With all due respect, how does one bleed the throw-out bearing/slave without the use of the SD2 on the F1?
    Thanks,
    pino
     
  6. chaa

    chaa F1 Veteran

    Mar 21, 2003
    5,058
    Thanks for that man, did not know that:)
     
  7. ferrarioldman

    ferrarioldman Formula 3
    Professional Ferrari Technician Silver Subscribed

    Jun 19, 2002
    1,033
    Summerfield, NC
    Full Name:
    Tom Jones
    After all parts are replaced and fluid has been topped up, turn on ignition key for about 1 second. This build sufficent pressure to start bleeding. Leaving it on longer builds more pressure than you will need and can end up making a mess. Open bleeder screw then manually activate the solenoid for the clutch with an external 12V power supply. This is the top solenoid toward the rear of the car. After the pressure is exhausted, close the valve and repeat this procedure until no more air comes out of the bleeder.
     
  8. Ferrari Fanatic

    Ferrari Fanatic Formula 3

    Apr 2, 2003
    1,317
    SoCal

    Could one just not use the hot wire post on the starter as it is conviently located on top of the bell housing? Need it be external??
     
  9. pino

    pino Karting

    Nov 1, 2003
    208
    South Central PA
    Interesting!
    Thanks for taking the time to explain that.
     
  10. stason

    stason Rookie

    Mar 8, 2006
    9
    Thank you so much for your help. I truly appreciate your prompt and
    thorough responses. I will be sending my clutches in to be rebuilt as
    well as purchasing the parts you recommended so I can get the 'rarri
    back on road!

    One last thing. How many seals for the T/O bearing, clutch shaft, and input shaft will I need to replace in total? (so I know what to order and am ready for the project). Thanks again.
     

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