rod knock

Ok I have absolutely zero clue what this is. It literally just started like 10 minutes ago. Sorry for the very short clip but that’s what was allowed to send. Btw the clip of me walking is what it usually sounds like. Some context though. I have to replace my tensioner and fuel pump. So it could...

I have a neglected '94 Explorer with a 4.0 OHV engine, my brother and I are rebuilding. My issue appeared after fixing warped heads. A loud, almost a tin can clacking sound started somewhere on the drivers side of the engine. We've also changed spark plugs, wires and the ignition coil, but...