Why is my Nissan Patrol's engine making a strange noise?

I recently noticed that whenever I start my Nissan Patrol, the engine is making a strange noise. It almost sounds like a whirring or grinding noise. Can anyone tell me what could be causing this and if it's something I should be concerned about?

It's possible that there could be an issue with the engine's belts or bearings. It would be best to take your Nissan Patrol to a mechanic to have it checked out.