Help with engine noise???

Well,since the pan is off,Theres two things that come to mind.
Timing chain,Wristpin(s),or front rod bearing(s). Oh wait, thats three.
Start with the chain and wrist pin exam. If its not there, pull the rod cap off #1, and/or #2.
With the pan off its easy to check all of these. The chain is as simple as; A) stick something up in the chain house and move the chain back and forth, or B) rock the crank back and forth, and watching the chain action at the lower sprocket. Wrist pins can be checked the same way; rocking the crank, and also listening.I mention the front rod bearings, because in my experiences, those are the first to go.