Okay so I tried the dash and it's definitely in the engine bay. I've stuck my head near the back of the engine bay and it seems to be coming from there. The videos I'm taking can't really get a good sound file of the noise due to background sounds and just crappy mic quality. Closer to driver's side. I'd say around below the valve cover is where the sound is greatest (in terms of how 'deep' down in there it is), but that could just be weird acoustics. It's like a rattley tick, like the sound a bicycle makes when it's coasting.
