The car will not run without fixing the water pump.
How do you replace a water pump on a 1995 Kia Sephia? Step by Step. on 1995 Kia Sephia
Alldatadiy.com there are way too many steps to just explain. Bottom line this a timing belt engine and will. Require tear down and reassembly of that area. This isn't rocket science but incorrect reassembly can result in engine damage. Please becareful and if you feel overwhelmed take it to a professional.