Symptoms
| Possible Causes
| Remedy
|
Coolant leakage
|
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•
|
From the thermostat gasket |
| Check the mounting bolts
|
|
•
|
Check the torque of the mounting bolts |
|
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•
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Retighten the bolts and check leakage again. |
|
Check the gasket for damage
|
|
•
|
Check gasket or seal for damage |
|
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•
|
Replace gaskets and reuse the thermostat. |
|
Cooled excessively
|
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•
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Low heater performance (cool air blows-out) |
|
•
|
Thermogauge indicates ''LOW'' |
| Visually check after removing the radiator cap.
|
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•
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Insufficient coolant or leakage. |
|
|
•
|
After refilling coolant, recheck. |
|
GDS check&Starting engine
|
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•
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Check the fan motor performance as temperature varies. |
|
•
|
Check connection of the fan clutch or the fan motor. |
? If the fan clutch is always connected, there will be a noise at idle.
|
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•
|
Check the engine coolant sensor, wiring and connectors. |
|
•
|
Check the fan motor, the relay and the connector. |
|
•
|
Replace the componants. |
|
Remove the thermostat and inspect
|
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•
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Check if there are dusts or chips in the thermostat valve. |
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•
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Check adherence of the thermostat. |
|
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•
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Clean the thermostat valve and reuse the thermostat. |
|
•
|
Replace the thermostat, if it doesn''t work properly. |
|
Heated excessively
|
|
•
|
Thermogauge indicates ''HI'' |
| Visually check after removing the radiator cap.
|
|
•
|
Insufficient coolant or leakage.
? Be careful when removing a radiator cap of the overheated vehicle. |
|
•
|
Check air in cooling system. |
|
|
•
|
After refilling coolant, recheck. |
|
•
|
Check the cylinder head gaskets for damage and the tightening torque of the mounting bolts. |
|
GDS check&Starting engine
|
|
•
|
Check the fan motor performance as temperature varies. |
|
•
|
Check if the fan clutch slips. |
|
•
|
Check the water pump adherence or impeller damaged. |
|
|
•
|
Check the engine coolant sensor, wiring and connectors. |
|
•
|
Check the fan motor, the relay and the connector. |
|
•
|
Replace the fan clutch, if it doesn''t work properly. |
|
•
|
Replace the water pump, if it doesn''t work properly. |
|
Immerse the thermostat in boiling water and inspection.
|
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•
|
After removing the thermostat, check it works properly. |
? Check the thermostat opens at the valve opening temperature.
|
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•
|
Replace the thermostat, if it doesn''t work properly. |
|
Kia Sportage: Thermostat: Troubleshooting
Thermostat: Repair procedures
