Thats a good question. In the morning, its silent, but starts getting rough when I'm driving. Once I park, you can still hear it but it's not as prevalent. So no, it does it while the car is running, but very slightly when the engine is off.
Shifting wise, its a tad bit rougher than I remember it being when I first got the car a month ago.
Typically, throw-our bearing noise only occurs when the engine is running
. It is caused by a worn out (dry) bearing (only makes high pitched noise when rotating), and will be heard when depressing the clutch pedal. If you hold the pedal partially
depressed, the sound will be there. It only
goes away when the pedal is released (top of travel). That is when the bearing is free of the rotating clutch pressure plate. When not rotating, it doesn't make noise.
If the sound is there when the engine is off
, then it has nothing to do with the throw out bearing. More than likely, the clutch pedal linkage, cable or clutch release arm (transmitting sound thru the cable). Let me correct my statement above: The throw out bearing rides on a collar, which is sometimes made of aluminum, which can gall. Therefore, check at the opening to the bell housing, also (where the throw out arm passes thru it). Since it will make noise when the engine is off, it should be easier to find.