engine noise

I just wanted to update this thread since I completely dissasembled this thing yesterday. Number 5 main bearing was badley gaulded but it wasn't spun. This was the very last thing that I thought the problem was as I have heard bad bearings in the past and the were always noisy at start up and at idle which this was not. They are federal bearings and I had my mains and rods set up at .002 clearence. I used bearing gaurd assembly lube and primed my pump before start up so this was a little suprising to say the least.