Why is my Kia Picanto's engine making a strange sound?

I recently noticed that my Kia Picanto's engine is making a strange rattling noise. It doesn't seem to affect performance, but I'm worried it might be something serious. Can anyone give me some advice on what could be causing this and how to fix it?

It could be a problem with the timing chain or lifters. I recommend taking it to a mechanic for a proper diagnosis.

Check the oil level and make sure it's not low. Low oil can cause engine noises.

I had a similar issue and it turned out to be a loose heat shield. It was an easy fix, just make sure to tighten all bolts and screws properly.

It might be a faulty exhaust manifold gasket. You should get it checked out as soon as possible to prevent further damage.