Technical Rattling noise from the clutch area, 2007 Doblo 1.9mjtd

[SemSu]

Soo,
The cluch went on the Doblo 2 months ago, and had been changed together with the DMF.
Now it developed a rattle at idle. The sound is coming from the gearbox bell housing.
My first guess was the clutch bearing, but there are a few strange symptoms:
-The rattle starts to be louder as the engine warms up.
-The rattle does not change with cluch press or release.
-The sound does not change as I load the gearbox, 1st gear handbrake.
-The sound goes away over 1400ish rpm
-The sound goes away for a short moment when turning the wheel full lock.
Any ideas?

 

[jackwhoo]

Possibly crankshaft pulley getting worn out or the auxiliary belt or auxiliary belt tensioner or idler wheel

 

[SemSu]

Possibly crankshaft pulley getting worn out or the auxiliary belt or auxiliary belt tensioner or idler wheel

Sorry I did not add that the noise is coming from the gearbox bell housing.