The coolant in your KIA Sedona is responsible for making sure that the engine does not overheat. A mixture of an anti-freeze solution and water is cycled through the engine. The coolant then runs through a radiator, which acts as a giant heat sink, "wicking" the heat away from the engine. Without coolant running through the system, internal components could overheat and break. Over time, the rubber hoses that the coolant flows through may crack from the constant heating and cooling. If the rear coolant line does start leaking, you'll need to fix it to make sure that your system is operating optimally.
Make sure that the engine is completely cool, then place the catch pan under the radiator drain fitting. Loosen the fitting and allow the coolant to drain out of the radiator.
Loosen the hose clamps that secure the rear coolant line.
Pull the coolant hose off.
Slide the new hose clamps over both ends of the new coolant hose and install the hose.
Tighten the hose clamps at the end of the hose to secure the hose in place.
Refill the radiator with coolant mixture until the radiator is full. Check the reservoir tank and fill it until the fluid level is at the upper fill mark on the outside of the tank.
