Slight knocking noise from Engine 4.4

[Rockit]

I just noticed on my 02 4.4 I have a slight knocking noise when I bend down by the pass front wheel like if you where cleaning the wheel. It's coming from the engine but I don't know if it's high on the engine or low. It has to be quit to hear.

If your over the engine with the hood up you don't hear it. If your on the drivers side wheel you don't hear it.

It does sound like a bad rod bearing but it also could be a sound coming from the flywheel or crank pully.

If anyone has the time with a 4.4 can you go to your pass front wheel while its idling and squat down and see if you hear a slight knock noise.

I hope to hell I don't have a bearing going bad with only 83k.