Clutch Fails But Reservoir Full

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mjb920 - 25 Feb 2005 19:14 GMT

The clutch in my '96 Miata went from being fine in the morning to
useless at lunchtime. The clutch pedal feels like there is no pressure
at all. The reservoir is full, but the fluid looks dark at the bottom.

Thanks,
Jim

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Natman - 25 Feb 2005 19:54 GMT

>The clutch in my '96 Miata went from being fine in the morning to
>useless at lunchtime. The clutch pedal feels like there is no pressure
>at all. The reservoir is full, but the fluid looks dark at the bottom.
>
>Thanks,
>Jim

The slave cylinder doesn't have to let fluid out for the clutch to
fail. All it has to do is let air in. Fortunately it is relatively
easy to change, just remove the RF wheel and there it is.

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mjb920 - 25 Feb 2005 20:10 GMT

> >The clutch in my '96 Miata went from being fine in the morning to
> >useless at lunchtime. The clutch pedal feels like there is no pressure
[quoted text clipped - 6 lines]
> fail. All it has to do is let air in. Fortunately it is relatively
> easy to change, just remove the RF wheel and there it is.

Thanks for the info. I guess the crud at the bottom of the reservoir
would be from the slave cylinder? I saw a decent article on replacing
the slave on miata.net.

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Natman - 25 Feb 2005 22:19 GMT

>> >The clutch in my '96 Miata went from being fine in the morning to
>> >useless at lunchtime. The clutch pedal feels like there is no
[quoted text clipped - 12 lines]
>would be from the slave cylinder? I saw a decent article on replacing
>the slave on miata.net.

The clutch fluid seems to turn black regularly. In theory it could be
either the master or slave that is failing. In practice it seems that
the slave fails first most of the time.

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