Anyone know what this knock is?
 

Started my engine and heard this click

was the a/c on? almost sounds like the a/c clutch. another thought is it does sound like it s along the belt line and pully.
see if a/c on and then off changes anything.

The only reason I heard it was because the AC was off. I have no clue what it is since nothing on the dash is on. The only thing I can think of is that my gasoline light just lit up and my oil is down to its last green bar. Guess I'll fill em up and see if I still hear it.

doubt that will do anything, sounds external on the engine.

Hmm, yeah its not related to oil or fuel