Hyundai Repair: 2006 Sonata Steering pump whine, power steering fluid, particulate matter

Question
Hello, I have a whine in my steering pump. I took the vehicle to the dealer over this a few years ago and was told to suck it up, it's normal. the vehicle now has over 80,000 miles on it, and the whine, while never causing a steering issue, either seems to have gotten louder, or I am just noticing it more. it only whines when I turn. The fluid looks good, doesn't smell burnt. I understand it takes a spec 4 fluid, but cannot find this fluid anywhere, as i was wanting to change it out and clean the reservoir ( I read the reservoir may be an issue according to TSB's) to see if that would make it go away. Any suggestions on what to do with this, short of getting shafted by the stealership for a new pump that should have (IMHO) been changed long ago? Thanx, Tim

Answer
First, verify the noise is coming from the pump.  With the car running (and an assistant turning the wheel if necessary), probe the pump with a long screwdriver or similar device.  Then place your ear on the other end of the screwdriver.  You should be able to hear the noise clearly through the screwdriver if the pump is indeed the source of the noise.  You may want to probe around different areas/items for comparison.  

Before attempting any other service, check the screen in the bottom of the reservoir as the TSB indicates.  If it has a significant amount of particulate matter in it, you can try to clean it, but you won't have any direct access to the screen.  Ultimately, you'll probably wind up replacing it.  Attempting the cleaning falls into the category of something I'd try on my car but not on a customer's car.  I.e., I'll understand that it may not work but is inexpensive to try.  

I haven't experienced any issues with regular power steering fluid in this system.  If you want to use the fluid specified, you'll probably need to purchase it at the dealer.

If the reservoir screen is clear, inspect the lines and hoses for crimping.  Excessive restriction can also cause steering pump whine.

The drive belt idler pulley is a common failure, and it makes a noise exactly like a power steering pump whine.  The noise, however, occurs anytime the engine is running and varies with engine speed but not steering input.  If you'd like to check this as well, simply pop the plastic cover off the center of the pulley and place the long end of the screwdriver on the bolt attaching the pulley.