First I would check the power steering fluid level and the belts.

power steering fluid is at proper level
joel

If you can reproduce the noise with the car standing still it must be relatively easy to find.
Have someone turn the wheel while you are listening, preferably with a car stethoscope. Be careful not to stick your head or any other body part under the car while it is running. It can be a the steering pump, ball joint or any other suspension part. Checking play by hand is generally not enough, the ball joints of the suspension are under great pressure and can be completely worn before you can feel the play.

ball joints are dry they will groan when you turn the wheels. if that is the case i would get a needle for my grease gun and shoot some grease into the boots.

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

Will it make the noise turning the wheel with the engine off? If so, you can eliminate power steering issues, as well as hear and localize the sound easier.

Steve

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'91 MB 190E 2.3
'08 RAV4 Ltd 3.5
'83 Lazy Daze m'home 5.7

thanks for suggestion I will try with engine off
Joel