Loud hissing sound when pressing the clutch pedal

[Kneale Brownson]

The hissing may be the throwout bearing "idling" and it gets louder as you put the bearing to work by pressing the clutch pedal.
   
  

Andrew <elms88 at gmail.com> wrote:
    On 8/24/08, Kneale Brownson <knealeski at sbcglobal.net> wrote:     If there is no noise without touching the pedal and noise as soon as you do touch it, I'd bet on the throwout bearing.  Don't drive it till it fails because a throwout bearing can disintegrate and its parts can tear up the rest of the clutch/flywheel interface.
   
   
  There is this hissing noise even without touching the pedal. But it gets noticeably louder as soon as I barely touch it. Any chance that this is hydraulic or pneumatic? I just find it a strange coinsidence if the clutch cylinder got the air inside (probably need to replace) and throwout bearing go out at the same time. 
   
   

    Andrew <elms88 at gmail.com> wrote:
    On 8/24/08, Huw Powell 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