Not that, nope not that either, still not that one!

[EKS PYB]

I have a '04, 169,020 miles in it and the alternator crapped out on my last month so I went ahead and changed that. After that incident there's a whining sound whenever on idle or when I step on the gas. But before I left, my indy said that I needed to change the 2 pulleys, AC Belt and the tensioner belt for Alternator, Water Pump and Power Steering so I got the parts and dropped them to get installed.

Went home while the X5 was at the shop and did a search here and found people posting about that whining noise and said that the pulleys, belts might be the culprit. So I was happy to hear that I might have fixed the problem. Now, installation done, I went picked up the car then the whining sound is still there. Told my indy and he said that it might be the MAF or something so I went home, unplugged it, checked my AFS system and no leaks no nothing. So I searched here again and said that it might be the Fan Clutch. I went ahead and got the fan clutch, had it installed and still the whining is still there. Now, I read again that it could be the Disa valve so I went and did this myself with a repair kit. Pretty simple actually, installed it back and still the whining sound is there. So what's next? I'm due for an oil change in a week or so and I might have to have my indy do a full check on hoses or something to see if there's any leaks.

Things replaced but no success in getting rid of whining noise:
Alternator
A/C Belt Tensioner
A/C Compressor Belt
Adjusting Pulley
Idler Pulley
Fan Clutch
Disa Valve Repair Kit

Got any ideas?