E39 viscous fan

[chasdad]

Hi, I've just bought an e39 528i sport.It seemed to have a noisy viscous fan so I took it to my local indie and they agreed.
First one they fitted seemed no better so took it back and fitted another.This one seemed a bit better but I think it was me hoping because it isn't .Took the car back today and they reckon it must be something else making the fan need to work. Any ideas maybe a temperature sensor? Help please it's driving me mad.

[chasdad]

Being as it's the wife's car I dont drive it much so Ive just gave it a run.it seems the fans loud when first started and it seems to go when the cars kept above 20 ish mph. Soon as I stop it gets louder. Is that normal for a new viscous do they have to bed in. It's not the water pump ,fans not wobbling orni bearing noises.

[chasdad]

It's the 2nd one the indie fitted both were noisy and different makes. Think they were pattern parts because they were too cheap to be original. If it turns out this is how they sound when ok ill have to bite the bullet and get a BMW one . Can't live with that sound