Loud hissing sound when pressing the clutch pedal

[Andrew]

On 8/24/08, Huw Powell <audi at humanspeakers.com> wrote:
>
> Sounds like it might be the throwout bearing on its way out?


Despite the hissing appearing even when I barely touch the clutch pedal?
Also, this would make it totally unrelated with the hydraulic problem that
the clutch seems to have as the clutch cylinder had air inside. Is it just a
mere coincidence?

Andrew


Andrew wrote:
>
>> Hi folks,
>>
>> Greetings from a returning old-timer of this list. I was an active member
>> of
>> an old q-list about 10 years ago but uns*bscribed when I had to part with
>> my
>> beloved 4kq. Now, I have a technical question not exactly about an Audi
>> but
>> still Audi-related.
>>
>> My 1999 Passat 1.8 T, is in many ways similar to an A4 and perhaps some of
>> the list gurus could help me out.
>>
>> It first started with a clutch pedal not returning all the way up after
>> being released. So, I had to push up it with the toe. The brakes beeding
>> was
>> long overdue anyway, so I bled the brakes and the clutch and the pedal now
>> goes all the way up. However, there is now some loud hissing or whistling
>> sound heard when I press on the clutch pedal. I would describe the sound
>> to
>> be similar to hissing of the worn-out belt. Except it clearly comes from
>> the
>> rear (not the front) of the engine. So, it cannot be a belt. The sounds
>> starts to be heard as soon as I press the clutch pedal only slightly and
>> gets louder when I press it all the way. IIRC, the hissing, although less
>> loud, was there before the bleeding but now it is totally outrageous.
>>
>> I suppose these may be a very well known symptom but having very little
>> experience myself with this type of car, I am asking here for an advise.
>> Any
>> suggestions would be greatly appreciated.
>>
>> Cheers,
>> Andrew
>>
>