Rattling noise near serpentine belt?

2005 Honda Accord ex-l 4cyl with 161,000 miles. I have been hearing a rattling noise coming from the belt area loudest in the front side of the engine. It seems to come on and off every 10 seconds. I replaced the belt tensioner as well as the serpentine belt. The alternator has 8,000 miles on it. I took it to the Honda dealer and their best guess is that it was the tensioner which i replaced today. The noise is still there. I included a video uploaded on youtube at the link below. The noise doesn't seem to be coming from the steering pump. Any ideas?



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