Well finally I think I figured out it's the AC compressor bearing that is making that noise and the larger 80mm idler Pulley.

Wonder if the compressor is repairable! or see if anyone has one laying around.

Thanks

 

Spray some white silicone grease on it and see if that will help it any, on the ac compressor that's is

 

I have that exact same whine. I'm pretty sure it is the alternator but I have changed it three times and its still there. Going to take the serpentine off and grease all my puller bearings to see if that helps. My Water pump and Power steering pump were just replaced and I know it's not coming from there. The sound is high on the motor and strongest when the ear to metal trick is applied to the alternator.

I did just read a notice with the new alternator that a new serpentine with a tight tension pulley can create the whine in the alternator.

 

Just my 2 cents here but i replaced my power steering pump with a brand new LR unit and still had the whine, got a bad unit...had to get it replaced with another unit (for free) and that did the trick. Just because its new doesn't mean its good anymore...

 

I think i found my issues. AC Compressor Bearing and the 80mm Pulley.
I am replacing them all and new Belt


See the posts here on page 5&6
https://landroverforums.com/forum/di...e-82205/page5/

 

my disco had the same noise sure enough it was the ac compressor. I have a stethoscope so I used it in that area to isolate the noise then to confirm I took off the belt and turned all the pulleys to see if it was dragging and sure enough the compressor was binding. Glad you found it

 

It sounds the same as Sayeed's problem but maybe not exactly the same bearing but a noisy bearing somewhere up front. Slacken off the serpentine belt and checkout each pulley for slackness and roughness when turned.