[Willie Williford]

Remove the valve cover as if you are going to adjust the valves and see how high you can pull the chain from the sprocket, at it's highest point.

Almost forgot:
PLEASE post your location in your profile/location.
THANK YOU
Willie

 

[Willie Williford]

Like Sam says, disconnect the serpentine belt and see if the noise goes away. Don't run the engine too long, maybe start with a cold engine.

HTH
Willie

 

[Willie Williford]

Sounds like ISB to me.