Water pump and radiator replacement.

Yep here are some guides and diagrams (below) that will help you get the job done, You will need to raise the car safely as well Here is a guide for that.

https://www.2carpros.com/articles/jack-up-and-lift-your-car-safely

and

https://www.2carpros.com/articles/water-pump-replacement

and

https://www.2carpros.com/diagrams/kia/sorento/2005

and

https://www.2carpros.com/articles/how-to-replace-a-car-radiator

Please let us know what happens and upload pictures of the problem.

Cheers, Ken