Bad news, I think it is a spun bearing so I may need to pick up a new motor. I'm going to check a few things first but I don't have high hopes.
Well before I found this all out obviously I did a wire tuck and cleaned up the harness some. Removed EGR, EVAP and BBV plugs. Moved the coil pack plug and #1 injector plug around to the passenger side Also got rid of the 1 unnecessary extra connector for the coolant temp sensor. Not quite sure why they had it that way?
Not finished painting the rad support or fender areas yet but the motor is probably coming out this winter so.
Wrapped the harness in exhaust heat wrap and then aluminum tape. I also made a bracket to keep it tight against the bottom of the upper intake. Bracket bolts to the hole for the EGR port on the LIM. It should be pretty safe there.
In this loom is the coil pack plug and cylinder 1 injector plug
Where the coil pack plug connects, under the pass side motor mount and coils.
Vacuum block doin it's thang. I really like it.
Here is some video's of the knock...
http://www.youtube.com/watch?v=jVXKV9kzhFQhttp://www.youtube.com/watch?v=IrbOMlKLUTE