Troubleshooting Unexpected Engine Noise in Nissan Patrol

Recently, my Nissan Patrol has been making a strange noise coming from the engine. It sounds like a rattling or knocking noise, and it's only present when the engine is running. What could be causing this and how can I fix it?

It's possible that your engine may have a rod knock, which is a serious problem that could cause significant damage if left unchecked.

Another potential issue could be a loose or worn belt, which can cause a loud squealing noise. I would recommend checking your belts for any signs of wear or looseness.