Some noise is coming when the car is running at idle. The noise goes away when the clutch pedal pressed. This is happening immediately after replacing the clutch and clutch release bearing. what will be the root cause of this noise?
There is a very good chance that the clutch throwout bearing was not inserted flush into the 'throwout arm'.
If the bearing is off center (which is possible but not guaranteed) it can make some strange whirring noises.