That's a nasty noise
Your gauges are not connected ??????? and you've been driving it like that?
How did you imaging you were going to monitor the engine operation?
It's great that you have posted a video, but , The video is crap. Please post another one where you are steady on each part of the valve train for much longer. stay steady so we can watch the movements and time the knocking to what we see. I have looked at your video 20 times just trying to time the knock to the movement. I want to look at all the pushrods operating, slowly, and the valve springs operating, slowly.
Can you check the valve clearance ? even if you just slip a 010" feeler under the rocker arms while it is running will help you isolate the noise to one or more valves/cylinders.
If you can do this , let us know where it goes quiet , or not.
Is the fan, generator fan , fan belt clear of everything thru full engine rotation?
Last edited by Dusty; 11/22/2012 5:21 PM.