I've had several people look at this and a garge had the car for 3 days and couldn't figure out what the noise is or where it's coming from. It happens when the engine has warmed up some and the steering wheel is turned enough for the power steering to engage, most noticable when parking or stationary and turning the wheel slightly.
A scope has been on every pulley, the belt has been changed 3 times, idle pulley replaced, tensioner adjusted. The vacuum hoses have been replaced and are all clear, the PCV valve on the power steering pump has been changed for new, power steering fluid flushed and replaced. It seems to be coming from behind the driverside cam cover when listening, but the scope says no.
I wondered if anyone has come accross something like this before and has an idea what next to look into. I've been advised to run the car as normal and see what changes if at all. I changed the engine and transmission oil prior to noticing this sound happening. Doesn't affect the function of anything, no codes from the OBDII scanner. Engine is a Lexus 1UZ VVTi.