Whistling belt /pulleys

[Custom155]

Hi,
My 2014 155hp Limited 110k miles Tourneo has developed a whistling noise that appears to be coming from the belt / pulley area. Disappears a bit (and sometimes completely under load) and turning the a/c on or off makes no difference. The serpentine belt was replaced 6000 miles ago with a genuine Ford belt. There’s no warning lights on the dash. Had a feel of the belts and nothing appears to be loose or hanging off. Any ideas?

Cheers, James.

[Custom155]

Hi,
Doing a bit of digging online and it seems to throw up the serpentine belt tensioner as a possible culprit.. Will keep looking. Anyone changed one of these? Hard to do?

James.

[Custom155]

Hi,
Turned out to be the damped crankshaft pulley beginning to separate. Genuine one fitted at the local garage so back to a quiet engine again. I mean Transit quiet obviously...

Cheers, James.