Chuckling noise coming from radiator fan has slight wobble

What is your question?

This is a new sound that started recently. It sounds like a chuck chuck chuck noise almost like a train. It almost sounds like the fan is lose and rattling as RPMs increases. Even on idle it will make that chucking noise. There was a little liquid under my parking spot from overnight and not sure if thats relevant or not. Its located near the radiator fan/belt area at the front of the vehicle.

What makes this problem better or worse?

Increased RPMs make the noise occur faster

How long has your 2003 BMW 325i had this problem?

Just started this morning