Kia Optima: Cooling System / Radiator
Components and components location
| Components |
| 1. Radiator 2. Radiator upper mounting bracket 3. Radiator upper hose 4. Radiator lower hose |
5. Radiator lower mounting insulator
6. Radiator air guard 7. Degassing hose and pipe |
Repair procedures
| Removal and Installation |
| 1. |
Remove the cooling fan. (Refer to Cooling System - "Cooling Fan") |
| 2. |
Drain engine coolant by loosening the drain plug. (Refer to Cooling System - "Coolant") |
| 3. |
Disconnect the radiator upper hose (A).
|
| 4. |
Disconnect the radiator lower hose (A).
|
| 5. |
Remove the front bumper assembly. (Refer to Body (Interior and Exterior) - "Front Bumper Assembly") |
| 6. |
Remove the radiator upper mounting bolts (A) and then remove the radiator upper mounting brackets.
[LH]
[RH]
|
| 7. |
Remove the radiator air guard (A). [LH]
[RH]
|
| 8. |
Separate the condenser from the radiator. |
| 9. |
Pull the raditor (A) upward and remove it from engine room.
|
| 10. |
Install in the reverse order of removal. |
| 11. |
Fill with engine coolant. (Refer to Cooling System - "Coolant") |
| 12. |
Start engine and check for leaks. |
| 13. |
Recheck engine coolant level. |
| Inspection |
Reservoir Cap Testing
| 1. |
Install the pressure cap and pressure tester on a SST (0K253-G5100).
|
| 2. |
Apply a pressure of 125.52 - 154.94 kpa (1.28 - 1.58 kg/cm², 18.21 - 22.47 psi). |
| 3. |
Check for a drop in pressure. |
| 4. |
If the pressure drops, replace the cap. |
Radiator Leakage Test
| 1. |
Wait until engine is cool, then carefully remove the reservoir tank cap and fill the radiator with engine coolant, then install it on the pressure tester.
|
| 2. |
Apply a pressure tester to the radiator and apply a pressure of 125.52 - 154.94 kpa (1.28 - 1.58 kg/cm², 18.21 - 22.47 psi). |
| 3. |
Inspect for engine coolant leaks and a drop in pressure. |
| 4. |
Remove the tester and reinstall the reservoir tank cap.
|
Cooling Fan
Components and components location
Components
1. Cooling fan
2. Cooling fan motor
3. Cooling fan shroud
Specifications
Specifications
...
Water Temperature Control Assembly
Components and components location
Components
1. Water temperature control
assembly
2. Engine coolant temperature sensor
3. Throttle body coolant hose
...
Other information:
Kia Optima DL3 2019-2025 Service and Repair Manual: BCW & RCCA Indicator
Repair procedures Inspection 1. Remove the front door trim. (Refer to Body - "Frond Door Trim") 2. Check that the mirror operates properly as shown in the table below. Removal 1. Di ...
Kia Optima DL3 2019-2025 Service and Repair Manual: Line Pressure Control Solenoid Valve
Specifications Specification Item Specification Control type N/H (Normal High) Control pressure (kpa (kgf/cm², psi)) 0 - 519.75 (0 - 5.3, 0 - 75.38) Currency (mA) 0 - 850 ...
