What am i hearing?

[Waterloo]

The more I listen to your recording the less I hear!

The tensioner pulley on mine would make a sound kind of like that prior to failing. It is the one located on the top passenger side and is easy to fix, if that is your problem. But if it has been going on for that long, I doubt it is that particular pulley. Look around all of the pulleys for signs of rubber and pull the belts to inspect all of the pulleys if that is what you think it is. My experience with pulleys is that they make noise and then fail quickly. I doubt it is a pulley, but could be, stranger things have happened.

I would also get under the truck and just lay there and look. Turn the radio off, put the dog in the house and just look. You will be amazed at what you can find out of place under there if you just look. I shake my head every time I crawl under mine.

Oh, how old is the damper? I was amazed at what replacing mine did for my motor. Cured a few things, vibration, pulley failures, general tone of the motor.

I listend to your recording again, almost sounds like your AC compressor pump clicking on and off... ? Maybe a bad clutch on the AC compressor?

Check your springs too, front and back, use a pry bar to just nudge them around, see if something moves that should not. I have seen that too, they can make an intermittent metal to metal sound (cling, cling) going down the road if something is out of whack.