Throw out bearing?, only when cold Options

[ericoneal]

Whenever I start my car when its cold and press the clutch, its making an awful rattling sound, even at idle. The noise increases as a push on the clutch pedal and from my research on here and YouTube, it sounds like the throw-out bearing on the transmission.
The odd part of all of this is that it only happens when the engine is cold. Once I let her warm up for a few minutes, the noise is gone by the time I'm leaving the house (Reverse, then Forward, then no more sound) Everything seems to be shifting fine and the noise disappears.
Something is going on down there, do you guys think its safe, mechanically, to drive it like this for awhile or will a worn throw-out cause more damage?
Seems like an easy fix as soon as I can get time to drop the tranmission.

[zipedadoo]

It sure sounds like a release bearing to me. I would get back under the car and remove the clutch cable and then try to release the clutch by hand. Granted you wont be able to move the lever much but maybe you'll get a better feel for whats going on. Also have some one push the clutch in as you watch from underneath maybe a worn mount or something moving around thats not supposed to.