Originally Posted By: Cujet
Taylor,
I don't believe the bearing spun.
I don't see any problem with the pictures of the connecting rods. Sometimes the quality of the machine work is less than optimal and the final sizing is a bit rough. This is actually quite normal.
I don't see any extensive wear on the bearing.
I don't see where you've posted any measurements of bearing clearances. I can't help you without good data.
However, it looks to me like the bearings are not the issue, from the pictures I currently see. Could be a piston pin knock, or piston slap.
Please post DATA so I can help.
I'm inclined to agree with you. If the bearing had spun, the tab would have been long gone and the outside of the shell would have been toast. The wear marks on the I.D. of the bearing posted look semi normal to me. In fact, I've seen a lot worse operate normally before tear down.
Without hearing any knocking noise pre tear down, I also agree that it could be piston slap or wrist pin noise. I've heard some pretty chattery 4.7's- even when they were hot, and it definitely wasn't rod knock.