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cluch fluid change

Discussion in 'General Banter' started by pete59, Feb 13, 2012.

  1. pete59

    pete59 Zorg Addict
    East Anglian Crew

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    hello will replaceing cluch fluid improve gear change ,not that its bad or anything just sometimes can be a bit hit a miss,i know a CDV bye pass really helps,but lots of people seem to have a problem getting the right earls hose to fit there zed, mines a 99 2.0l any help greatly recived.thanks pete.
     
  2. Titan

    Titan Moderator
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    It is quite possible that changing the fluid will make a difference but it must be done correctly.
    You should also be aware that clutch and brake fluid systems are combined on the Z so you may as well do the brakes at the same time :)
    I would seriously recommend changing the hose as well. It is not difficult and Earls are really helpful people to advise getting the correct hose.
    Whatever you decide the clutch slave MUST be removed and inverted to bleed it otherwise air will remain trapped and you will have wasted your time.
    When you remove it be careful not to drop the actuating rod into the bell housing!!!
    Then compress the piston and hold it in during the bleeding process.
    I used a silicon mastic gun frame quite successfully here but didn't take any pictures.
    I can also recommend a Gunson EeziBleed (£20 ish) to simplify the bleeding process - it obviates all the up/down on/off pumping.
    It sounds daunting it really is quite easy to do. When you've finished you'll wonder what all the fuss was about !


    Z3nt from m'iPhone on Tapatalk
     
  3. pete59

    pete59 Zorg Addict
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    thanks titan,i would not do myself.i will get our garage who deals with our cars to do both,many thanks.pete.
     
  4. Frank.A

    Frank.A Zorg Addict

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    Be sure your garage is aware of the technique for bleeding the clutch as most makes of cars do not require the removal of the slave cylinder to enable successful bleeding. 8-|
     
  5. si-forks

    si-forks Dedicated Member

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    Thanks for starting this thread Pete59 because i want to do my 1.9 as the gear change can get very heavy in traffic ,I've had an Earls hose in my boot for a year !!

    Si-forks on tapatalk
     
  6. Boysie

    Boysie Zorg Guru (I)
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    'Snap' I drove around for a long time with one in my boot
    What a difference it made
    The ///M clutch is heavy and makes your foot ache
    With the braided clutch hose it helped a lot

    I believe Bmw say that all the fluids deteriate after a while,
    that includes the radiator fluids as well, hence the
    regular fluids change reminder on the dash, the clock
     
  7. si-forks

    si-forks Dedicated Member

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    Please forgive my ignorance but what is a C D V bye pass ? and does my 97 1.9 have one ? and if so how does it help with the cluch i have an Earls hose ready to fit should i do this at the same time ?

    Si-forks on tapatalk
     
  8. GazHyde

    GazHyde The Gaz Monkey
    Staff Member Administrator Global Moderator British Zeds

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    Si, this extract shamelessly ripped from the web... http://www.zeckhausen.com/cdv.htm

    The Clutch Delay Valve (CDV) is a one-way restrictor installed by the factory between the clutch slave cylinder and clutch master cylinder, as shown in Figure 1. It "delays" the engagement of the clutch, much like old record players use a damped tone-arm to gently lower the needle onto the surface of a record.

    Because of this valve, no matter how quickly you lift your foot off the clutch pedal, the clutch engages the flywheel at a constant (slow) rate. In theory, it can save the driveline from shock, were an inexperienced (or immature) driver to dump the clutch. But in practice, all it does is prematurely wear out the clutch and turn experienced drivers into people who, despite years of practice, cannot shift smoothly. During parallel parking maneuvers, the delay can be infuriating, causing constant clutch slippage. And during hard acceleration, the slippage can greatly shorten the life of your clutch. During normal, sedate driving, the shift from first into second gear is often jerky, leading passengers to question your skill. As the driver, you can see your passengers' heads bobbing back and forth during every shift! Yes, in their minds, they are laughing at you.
     
  9. Boysie

    Boysie Zorg Guru (I)
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    In other words your better without it
     

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