Diagnosis

[nnelson]

Can anyone help diagnose what might be causing this noise?

https://youtu.be/IIP87qX_gjQ

[Colin Edwards]

Drive the car and see what doesn't work or feels / seems iffy.  Could be power steering pump or aircon compressor.  Given its the middle of summer its probably the air con!!!!!

[Colin Edwards]

Water pump bearing?  Alternator?  Does the pitch of the noise rise and fall in harmony with engine revs?

[kaleuclint]

Hard to hear...  Doesn't seem to have that irregular grinding "rocks in the tumble dryer" sound which indeed signals a disintegrating water pump bearing.  Can't say my 2.2 ever chewed up this bearing, but my 1750 did.

From what I can hear it seems more likely to be alternator / fan.  That'd be cheaper to fix.  Seek professional advice.