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I was expecting to see some shiny rub marks on the case where a pulley or nut/bolt was rubbing on the inside. Instead I saw a shiny spot on the outside (see pic). Turns out the case was rubbing on the tin back there. I pushed it away as best I could then shoved some gasket material in there. Dont expect shim to last, but when I test drove it there was a marked absence of noise. I initially had thought I had a fan bearing going, but as noise got louder in higher frequency, I was able to narrow it to steering pump.
Thanks for all the help,
Dan
Shiny is edge of rear tin (I'm guessing) where case was rubbing.