This whining noise has only started since I installed a new tensioner a few days ago, but after taking off the belt which puts the auxiliaries out of action the sound still persists. Listening closely to the noise it appears to come from the crank pulley? / surrounding area so hard to tell really. I had installed a new water pump, cambelt and idlers last year so it shouldn't be that although I did not replace the hydro tensioner (could it have lost a bit of tension causing the noise?), checked the valve body and filter but that was clean as can be with no crud or gunk, although the fluid was dark brownish/red (Could just need a drain and fill?). All fluids, PS, Coolant, engine oil, ATF etc are all topped up. Happens both in Drive and in Park.
Not really sure what it could be, any advice/help greatly appreciated.
VID_20221106_152327.mp4
