Hilux Whirring Noise When Revving

[famz]

Hi Guys,

got a prob, our Hilux Pickup at work is making a whirring noise when i revv it while stationary and all the instrument lights are on. i dont think its the engine, sounds more from the cooling fan at front.

its fine at idle but as soon as i revv it, it starts whiring, the sound doesnt go up and down either...it gets louder as i rev higher and higher it gets less as i take my foot off the accelerator.

[GT4 BOOSTER]

its meant to do that .

its not an electric fan that kicks in when the engines hot , it speeds up and slows with the engine.

only noise you may hear whirring could be the alternator bearings.

[famz]

this is a wayyy louder whirring noise, alternator was checked and bearings were failed and the rotor hit the stator inside and smashed it all upp. but thanks for your reply

[Parts-King]

Take the fan belt off and run it without the belt for a few seconds, does it still do it?

Kingo