Clutch trouble on 512 TR | FerrariChat

Clutch trouble on 512 TR

Discussion in 'Technical Q&A' started by Dutchman, Apr 23, 2006.

This site may earn a commission from merchant affiliate links, including eBay, Amazon, Skimlinks, and others.

  1. Dutchman

    Dutchman F1 Veteran
    Lifetime Rossa Owner

    Dec 4, 2002
    6,184
    EU
    Full Name:
    Ton
    Hi guys,

    I need your help.
    Yesterday on a meeting I lost the pressure of my clutch after a few fast acceleration runs on the road. At first I thought that it was too hot so I let it rest for a while. After a bit the clutch felt better but a bit "shorter".
    This morning the clutch was fine, but after a short drive I completely lost the pressure on my clutch again. This time I could not even change gear.

    Could this mean that I have some air in the system? Do you have any ideas?

    Thanks for your input.

    Ton
     
  2. rjnavion

    rjnavion Karting

    Nov 1, 2003
    128
    Gate, OK (western O
    Full Name:
    Ron Judy
    It sounds like the clutch slave cylinder is going out. First try bleeding it. You might be lucky and it has air. Be sure the reservoir in the trunk is up to the required level and you'll need a helper at the clutch pedal while you're at the clutch housing. Place a hose on the bleeder and into a jar. You may have access to a reverse bleeder which is even better. I didn't. This helped mine for a little while, but finally had to replace the slave cylinder and throwout bearing. They're all built together.

    If this is the problem I'll give you some hints. The late ('94) models had an improved slave cylinder and I doubt the early ones are still available. Cost to convert mine was a little over $1200 parts. If you're used to doing some mechanical work on the car, it's not hard. The clutch page of the parts book gives the serial number break for the engine which is the deciding number, not the VIN #.

    Ron
     
  3. rjnavion

    rjnavion Karting

    Nov 1, 2003
    128
    Gate, OK (western O
    Full Name:
    Ron Judy
    One thing I forgot. While stopped, pump the clutch pedal fast several times. If you get a pedal that will release the clutch but doesn't last long, it's either air or the slave cyl. is leaking internally.
     
  4. Dutchman

    Dutchman F1 Veteran
    Lifetime Rossa Owner

    Dec 4, 2002
    6,184
    EU
    Full Name:
    Ton
    I am not much of a do-it-yourself person. Wednesday I will bring it to the garage. The dealer told me that it might also be some dirt in front of the cylinder. Does this sound plausible?
     
  5. PAP 348

    PAP 348 Ten Time F1 World Champ
    Lifetime Rossa Owner

    Dec 10, 2005
    100,232
    Mount Isa, Australia
    Full Name:
    Pap
    It should be a sealed system,so the likes of dirt ect.... do not enter and score the pistons and bores in the master cylinder and calipers causing premature failure. Although you cannot stop moisture getting in the system. Anyways,dirt entry is bullsh*t,but...........he may have meant that if the system has never been flushed,the brake fluid can go sludgy and yuk over the years and that settles in the master cylinder/fluid resivior and can cause grief/bleeding issues ect..As ive seen it many times before. Although im assuming that you have had the fluid flushed with the major service's many times,so it should not be the case here i would think. :)
    More than likely the clutch master clyinder or slave body seals gone. Let us know when they inform you Ton :)
     

Share This Page