E39 cooling fan running high

[E34-3.2]

Hi all,

A little bit puzzled at the moment. Just changed the radiator (due to leaks), fan, water pump and temperature sensors but for some reasons, the cooling fan is suddenly running super high. As I accelerate, it sounds like I have a 747 under the bonnet! It just does it randomly ( I think).

Any idea?

Cheers

[ian332isport]

Assuming this is the mechanical fan and not electric, it's probably a failing/failed viscous fan coupling.

They don't last forever and being removed and refitted has probably finished it off.

[E34-3.2]

ian332isport said:

Assuming this is the mechanical fan and not electric, it's probably a failing/failed viscous fan coupling.

They don't last forever and being removed and refitted has probably finished it off.

Thank you. We will investigate.