Why is my Ford Transit Custom's engine making a strange noise while idling?

I recently bought a Ford Transit Custom and noticed that the engine makes a strange noise while idling. It's not too loud, but it's definitely noticeable. What could be causing this and should I be concerned?

It's possible that the noise could be coming from a loose or worn belt. You should get it checked out by a mechanic just to be safe.

This could be a sign of a problem with the engine's bearings. It's best to have a professional take a look at it.