W123 Gearbox/Clutch Problem

Discussion in 'Engine' started by 31records, Oct 9, 2011.

  1. 31records

    31records New Member

    Messages:
    15
    Joined:
    Aug 16, 2010
    Location:
    London
    Car:
    W123 230E.
    Hello All

    I have a 5 Speed W123 and for the past month I have had real trouble engaging first and second, such that I’m really fighting with the gearbox for the first 5 mins driving.

    Now I can’t even select a gear – even with two hands the gearstick won’t have it! So I’m now stuck in neutral and I will not be going anywhere until it’s sorted. Any ideas?

    I guess there’s more to this than ‘just’ bleeding the clutch.

    Thanks in Advance.

    Owen
     
  2. jaymanek

    jaymanek Authorised Forum Sponsor Authorised Forum Sponsor

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    Nov 29, 2002
    Location:
    Nuneaton Warwickshire
    Car:
    Lots of Mercedes!
    First thing to change on this box are the bushes on the selector rods.. They will be well worn,.,mine had completely fell to bits.
     
  3. Dieselman

    Dieselman Banned

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    Jul 13, 2003
    Car:
    Peugeot 403 Convertible
    If it will engage gear with the engine off but not on it's clutch drag.

    As a test, try pressing the clutch down engaging gear and starting the car. It could be a faulty pressure plate or clutch hydraulics, either master or slave cylinder.
     
  4. OP
    OP
    31records

    31records New Member

    Messages:
    15
    Joined:
    Aug 16, 2010
    Location:
    London
    Car:
    W123 230E.
    Thanks both for your advice, much appreciated.

    Jaymanek – I knew you would have experience in this area after reading about your fantastic W123 engine swap with Mr Ian B Walker! I was convinced it might be a box problem but Dieselman you’re right I can engage gear when the engine is off but not on, so it must be the clutch. Once the engine is on I can deselect but not select gear.

    Price of master/slave cylinders look reasonable (£46/£37 on eurocarparts) but is this a big job? I will have to take it into my local garage, so looking for an idea on labour.

    Haynes manual suggests slave cylinder easier to replace than master cylinder.

    Thanks

    Owen
     
  5. jaymanek

    jaymanek Authorised Forum Sponsor Authorised Forum Sponsor

    Messages:
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    Lots of Mercedes!
    they are both easy to do. bleeding them can be a pain though... i use a mityvac
     
  6. OP
    OP
    31records

    31records New Member

    Messages:
    15
    Joined:
    Aug 16, 2010
    Location:
    London
    Car:
    W123 230E.
    Great – thanks again Jaymanek – I’ll talk to the garage and see what happens.
     

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