Strange noise

My 96 camry with the V6 just started to make a grinding noise, it sounds like a fan rubbing up against the housing (but it’s not) and only when the engine is revved around 2000 rpm. I thought it was coming from within the timing belt housing, but I listened closer and now it sounds like it’s coming from somewhere on top of the engine. Any ideas???

How many miles does the car have?

Yes, I have a thought. An idler, or a tensioner. See the attached link.
http://www.partsgeek.com/mmparts/timing_belt/toyota/camry.html

Sound travels.

It has 203,000 miles