KIA IS STILL OVERHEATING,

scan vehicle for code you may have disconnected or damaged a sensor

recheck water pump and thermostat --check and test fans -radiator flow --and for possible head gasket failure

The fan relay is the most common failure point on these
Car overheats Chrysler Vehicles Ricks Free Auto Repair Advice

how is the oil level of the engine ?
Also could be a faulty thermostat in the cooling system .

I had the same problem with my 1999 grand am .I changed water pump, thermostat. I heard the Pontiac engines , 3.4 had overheating problems one is the intake gasket if your losing water but don't know were its going its leaking at the intake gasket and burning off or if you check the oil cap or the dip stick and theres a milky substance on them it would be your head gasket I had to change my head gasket and while I was there I changed the intake gasket too. I haven't had any problems sence I changed them hope this helps. Jack

you have overheated the engine maybe thermostat or water pump fault

could be a number of things, 1. water pump not working 2. Thermostat stuck (replace if its boiled) 3. air lock in system. 4. Head gasket. 5. cracked head/block. I presume you have checked that you belt is not broken, are there any signs of leaking around the waterpump? if there are, change the pump, If the engine has overheated, change the thermostat. these are the most common things, other than these 2 it is going to take further examination for cylinder head problems or blocked water ways. Go for the thermostat first, its probably the cheapest part to replace, and see if that cures your problem.

Then the problem is the water pump or a cracked Head, blown head gasket or cracked cylinder wall causing over pressure in the cooling system. Replace the water pump first then consider the other problems. If you do a compression check and have compression on all cylinders but extremely high compression on 1 or 2 then the problem is the Head gasket, head or Cylinder wall being cracked.

have you replaced the thermostat? This controls the engine temp

You could have several issues here. A blockage in the radiator, bad coolant temp sensor, (not turning the cooling fan on) a bad cooling fan motor. sounds as if maybe one of these may be your primary issue, and the cause of the overheating that originally caused your head gasket problem. Hope this helps