Clutch Slave Cylinder Bad?

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Andre - 12 Mar 2008 01:32 GMT

I just pulled my rubber seal from the clutch housing and was going to
inspect the clutch. As I pulled the rubber boot off I got a gush or brake
fluid all over my hand. Is the clutch slave cylinder bad or should I look
at something else? The car has been on jacks (the front) for about 5 months
now.....I had to replace the head gasket, don't know if this has something
to do with it.

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William Noble - 12 Mar 2008 07:43 GMT

if it sat for a long time in a damp climate I would not be surprized to find
both the master and slave bad due to corrosion, probably also the brake
master cyl - you need to flush and change brake fluid every 2 years minimum.
if you do that, the cylinders will last decades, if you don't they will fail
much much sooner.

if you mean the rubber boot on the slave cyl, then yes, it is bad, and I
have never seen a slave fail without the master also being bad - change them
both. You will need a pressure bleeder, or you will need a major amount of
skill and luck to get the air out of the system once you change the
cylinders.

Oh, and flush and clean the reservoir too

>I just pulled my rubber seal from the clutch housing and was going to
>inspect the clutch. As I pulled the rubber boot off I got a gush or brake
>fluid all over my hand. Is the clutch slave cylinder bad or should I look
>at something else? The car has been on jacks (the front) for about 5
>months now.....I had to replace the head gasket, don't know if this has
>something to do with it.

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Vball23 - 14 Mar 2008 14:05 GMT

In lieu of a power bleeder, go to the hardware store and by a garden
sprayer, the kind you can put liquid in and pump up to pressureize. Put a
fair amount of brake fluid in it and attach it to the bleed nipple with some
tubing. pump it up and then let it spray (actually will just flow), If you
use a long enough tube to attach it, you can stand up and watch the
reservoir. Soon, fluid will fill the reservoir, and voila, you're done. I've
done this successfully on my 924S, 944, and 928 S4.

+1 on replacing both cylinders, even if one isn't bad, it will be soon
enough and they are not expensive.

> if it sat for a long time in a damp climate I would not be surprized to
> find both the master and slave bad due to corrosion, probably also the
[quoted text clipped - 16 lines]
>>months now.....I had to replace the head gasket, don't know if this has
>>something to do with it.

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Andre - 14 Mar 2008 15:32 GMT

Thanks for the info...I did pull the slave off the car and it was rusted
inside....so I'm off to get a new one. Luckily for me the previous owner
already replaced the master cylinder.

thanks again
Andre

> In lieu of a power bleeder, go to the hardware store and by a garden
> sprayer, the kind you can put liquid in and pump up to pressureize. Put a
[quoted text clipped - 27 lines]
>>>about 5 months now.....I had to replace the head gasket, don't know if
>>>this has something to do with it.

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William Noble - 15 Mar 2008 01:18 GMT

change master cyl as well as slave - if you check master you will find that
it is leaking, I can almost guarantee it. note that a power bleeder
costs about $35, a sprayer is about $10 to $20 - it's not worth the savings.
DO NOT leave brake fluid in the power bleeder - brake fluid is hydroscopic

> Thanks for the info...I did pull the slave off the car and it was rusted
> inside....so I'm off to get a new one. Luckily for me the previous owner
> already replaced the master cylinder.
>
> thanks again
> Andre

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darthpup - 12 Mar 2008 17:24 GMT

If it was brake fluid then you need to replace or rebuild the slave
cylinder. It it was oil then the rear main bearing seal needs to be
replaced. If your car has over 100,000 miles you can expect these
problems.

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