Hmm something else that came to mind after the fact. There's no little
ring on the SS that holds the piston in. There should be, right? Its
dawning on me that without that ring, the piston might get too far out,
lose it's seal a bit, and then not be pulled back in when you let up on
the clutch. Would that make sense?
Tim Holt wrote:
> OK a couple of things...
>
> First, I just replaced the rubber hose, so I dont think it's at
> fault. The SS is about 6 months old.
>
> Actually this is the second time it's done this. We were bleeding it
> a week ago and it did it. That time we didnt' realize what was going
> on until it had shoved the piston very far out. That was with an old
> hose. So I ordered the SS "kit" and replaced all the parts, and got a
> new hose while I was at it.
>
> The piston moves fine manually when the SS is off the car - I can
> slide it in and out. I noticed that the spring inside does NOT make
> it come back out all the time. I don't know quite what the spring is
> supposed to do as it seems pretty weak compared to the friction the
> rubber ring on the piston has.
>
> I can also move the clutch arm that the SS pushes on fine (when the SS
> is not attached).
>
> I also was getting air and a bit of fluid (but hardly any) out of the
> bleed valve when we were bleeding it.
>
> We disconnected the SS and I just put my finger over the end of the
> hose (the end that screws into the SS) while Wes pumped and topped off
> the reservoir. Plenty of air and then fluid came out the hose so it's
> not clogged.
>
> Bob Howard wrote:
>
>>Tim,
>> It's possible that the piston in clutch slave cylinder got pushed into
>>a previously unused part of the cylinder and got stuck there. The area
>>not in contact with the rubber cups can become rusty and rough.
>> You might be able to put pressure on the bleed screw and force the
>>piston back, but I would expect that the rubber cup will be in need of
>>replacement.
>> If this happened while the hose was connected, you could also suspect
>>that the hose is coming apart internally, acting as a one-way valve.
>>Bob
>>
>>
>>
>> In fact this was because the slave cyl. was getting >
>>
>>
>>>extremely extended. It was extending, but never pulling back into
>>>the slave cyl. We disconnected the hose from the slave cyl and tried
>>>just pumping the clutch with a finger over that hose - and it seemed
>>>
>>>
>>to
>>
>>
>>>vent air and then eventually fluid. So that seems to indicate the
>>>
>>>
>>master
>>
>>
>>>on down to the slave is fine.
>>>
>>>So - if there IS something wrong with the slave, what can go wrong
>>>with one such that they get pressure but never let off! We opened up
>>>
>>>
>>the
>>
>>
>>>bleed valve when it did this, expecting that to let off the
>>>pressure, but nothing. A sign I suppose of that being clogged -
>>>
>>>
>>except that
>>
>>
>>>it did let out some air early when we were bleeding it.
>>>
>>>Thoughts?
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