Any suggestion what might cause it ?

Rusty

Sounds like throw-out bearing.

__________________

浪人 - 殺し屋
"The Difficult Anytime, The Impossible By Appointment Only"
http://www.the370z.com/members-370z-...o-journal.html

lauj

The delearship just put some lubrication on it and it did go away for a while. Now, it been almost a month, the sound come back again once I engage the clutch. I honestly think they did not even take a look at the throw out bearing last time I brought it to service and I did mention it to them to check my throw out bearing. Planning to take back back this weekend and see what they will say. The thing is , it doesnt happen often, like I said, it only happened in a very very cold weather.