Why is my Ford Puma engine making a rattling noise?

I recently noticed that my Ford Puma's engine is making a strange rattling noise. It only happens when the car is running, and it seems to get worse when I accelerate. What could be the cause of this and how can I fix it?

It is likely that the rattling noise is coming from the engine's valves. Take your car to a trusted mechanic to have them checked and possibly replaced.

Another possible cause could be a loose or worn-out belt. Have the belt tension checked and replaced if necessary.