Need squeak location assistance

[eightsandaces]

Does the AOS have any moving parts? It sounds like a momentary squeak, sounds like a spot on a rotating wheel, intermittent and subject to low rpm. I checked the water pump seemed great, the noise is definitely on the LR closer to the intake so I'm thinking PS pump noise. I will check again tomorrow with all the covers off. I checked the pentosin and at first it looked low, but the cold low level barely touches the stem.

thanks