Why does my Vauxhall Corsa engine make a rattling noise when idling?

I recently noticed that my Vauxhall Corsa's engine makes a rattling noise when the car is idling. It seems to go away when I start driving, but I'm concerned that there may be a bigger issue. What could be causing this noise and what should I do about it?

This could be a sign of a loose or worn out belt in your engine. It's important to have this checked out as soon as possible, as a loose belt could cause damage to other components of your car.

Another possible cause could be a problem with your engine's timing chain. This can often be fixed by simply adjusting the tension on the chain, but it's best to have a mechanic take a look to ensure there are no other underlying issues.

If your engine is making a rattling noise, it's always best to have it checked out by a professional. It's better to be safe than sorry and addressing the issue early on can prevent more serious and costly problems down the road.