I have replaced the Belt tensioner, idler pulley & the pivot arm, the nylon bushes in the tensioner looked a bit suspect.
Prior to changing the Tensioner, the vehicle would develop a bad squealing sound when accelerating and mostly only when going uphill, under load.
It would start to happen at around the 1800-2000rpm. If I eased of the throttle it stopped.

Last evening I took it for a drive and the squealing is still there but now it only starts to happen from around the 3000rpm mark,
and again only when going up hill, and under load, and as usual, as soon as I back of the throttle it goes away.

I drove the vehicle uphill on a narrow winding road with rock ledges either side.
It appears that it is coming from the front passengers side of the vehicle.

Have posted it here: https://youtu.be/pQlCyxMwLHc
Any suggestions at to what it may be.


(also found another problem which I will post later )