What is the cause of the rattling noise coming from my Kia Ceed's engine?

Every time I start my Kia Ceed, I hear a loud and persistent rattling noise coming from the engine. What could be the cause of this noise? Is it something I should be worried about?

It is most likely that the rattling noise is caused by a loose or worn out belt. It is important to get this checked out by a mechanic as soon as possible, as a loose belt can lead to further damage to the engine.

Another possible cause of the rattling noise could be a problem with the engine bearings. If this is the case, it is important to get it fixed immediately to prevent any further damage to the engine.

In some cases, the cause of the rattling noise could be something as simple as a loose bolt or nut. It is always a good idea to check for any loose parts and tighten them if necessary.