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2G losing clutch pressure when cornering

Posted by s61doc, Nov 10, 2019 at 10:36 PM

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  1. s61doc

    s61doc Supporting Member

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    Victoria, BC, Canada
    Ok, this has me a bit baffled. If I hit a corner hard, in a roundabout in first for example, and try to shift into second, I have virtually no clutch. When I hit the clutch again, usually not cornering hard any more due to the fact that I couldn't shift into second, the clutch engages like normal. Immediate thought was low on fluid, but it's not. Bled the clutch just a couple of weeks ago because I didn't like the feel. Still don't. I haven't had a manual trans for a lot of years, but I've had hydraulic clutches in the past and this one just seems soft and a longer throw than it should be. Is there something about the 2G DSM I don't know about? '96 TSI AWD

    Thanks all
     
  2. motomattx

    motomattx Proven Member

    1,762
    558
    Joined Dec 9, 2010
    wampum, Pennsylvania
    Sadly that can be the symptoms of advanced crankwalk.
     

    Drag Race Build 3K  16

    1995 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
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  3. s61doc

    s61doc Supporting Member

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    Joined Oct 5, 2019
    Victoria, BC, Canada
    So during hard cornering, the crankshaft and flywheel shifts to the left or right, being a transverse mounted engine, when there is too much endplay? If that is the case, then it would be different during left and right cornering, correct? Hard left would push the flywheel towards the throwout bearing, making the clutch actuate sooner. Hard right would be the opposite. Something to try out to isolate the issue perhaps.
     
  4. Mello

    Mello Proven Member

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    Joined Jul 4, 2003
    Albuquerque, New Mexico
    Loosen the clutch slave cylinder to remove any preload caused by the pressure plate whatnots. You can then measure the crank end play with a magnetic mount/dial indictor & pushing the crank in then out from the harmonic balance. You can also get enough access if you remove the tranny inspection plate. Standard value is .0020-.0071" and limit .0098".
     
  5. s61doc

    s61doc Supporting Member

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    Joined Oct 5, 2019
    Victoria, BC, Canada
    Ok, thanks Mello. I'm going to assume you meant 20-71 thou and 98 thou.
     
  6. Mello

    Mello Proven Member

    943
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    Joined Jul 4, 2003
    Albuquerque, New Mexico
    I meant exactly .0020-.0071" and limit .0098". 20 thou & 71 thou is not the same as .0020-.0071" and limit .0098" (or 2 thou to 7.1 thou). Metric is .05-.18mm with limit .25mm.
     
  7. s61doc

    s61doc Supporting Member

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    Joined Oct 5, 2019
    Victoria, BC, Canada
    Thanks for the clarification, those seem like pretty tight tolerances, but I haven’t rebuilt a motor since I was 18 so yeah. LOL
     

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