2000 BMW 323 Lound Wind blowing noise coming from the engin

Hi there,

In hot weathers, the engine makes a lound blowing noise continuously. The car does not over heat and there is no coolant leakage. In cold weather, I can hear the wind blowing noise a start up of the car and at take off and then gradually the sound goes away and does not come back. I've been told by a mechanic that the fan clutch is gone bad and needs to be replaced. I've got a new aftermarket one installed and I'm still having the same problem.

Any opinions on what the problem could be? Please get back to me with an answer.

Thanks,
Alex