Kia Troubleshooting Questions? Ask a Mechanic
Hello, my name is***** you for the question. If the engine suddenly got hot then it may be the thermostat sticking. It is located in the housing where the upper radiator hose connects to the engine. The only thing that concerns me is that the fluid was low. If the fluid was not lost out of the reservoir when the engine got hot then it is losing coolant someplace. Most of the time this is caused by a water pump that is failing. If there is no external leak at all and it is still losing coolant then it may be a head gasket. Did you plan on fixing this yourself?
Let me see what kind of diagrams that I have for this vehicle. Keep in mind also that a head gasket issue doesn't typically show anything under the oil cap if it is a small issue.
Unfortunately I do not have any diagrams for this. If the head gasket was slightly leaking you would not see anything, even in the exhaust.