I have a strange noise that sort of sounds like a chicken idly clucking.. or like a little elf knocking pieces of wood together at random when my 2000 Montero idles... nearest I can tell it's the PS pump but I have not yet isolated it by removing the belt for that (one good thing about having three belts, I guess)
I did spray belt dressing on the belt to see if it was just slipping belt, sometimes those chatter rather than squealing but it's not that, and with no steering input the pressure shouldn't be high anyway right?
This thread is probably useless without video/sound, but maybe somebody will say oh yeah they do that! and then later when I actually get out a video camera and record it this thread will already exist so I can just post it.
Sound is only obvious at idle but that doesn't mean it isn't happening at other speeds, other engine noises might be drowning it out. It seems to go away above idle though..