Kia Sorento: Thermostat Troubleshooting - Cooling System - Engine Mechanical System - Kia Sorento XM 2011-2019 Service ManualKia Sorento: Thermostat Troubleshooting

Second Generation XM (2011-2019) / Kia Sorento XM 2011-2019 Service Manual / Engine Mechanical System / Cooling System / Thermostat Troubleshooting

Symptoms
Possible Causes
Remedy
Coolant leakage
From the thermostat gasket
Check the mounting bolts
Check the torque of the mounting bolts
Retighten the bolts and check leakage again.
Check the gasket for damage
Check gasket or seal for damage
Replace gaskets and reuse the thermostat.
Cooled excessively
Low heater performance (cool air blows-out)
Thermogauge indicates 'LOW'
Visually check after removing the radiator cap.
Insufficient coolant or leakage.
After refilling coolant, recheck.
GDS check&Starting engine
Check DTCs
Check connection of the fan clutch or the fan motor.
※ If the fan clutch is always connected, there will be a noise at idle.
Check the engine coolant sensor, wiring and connectors.
Replace the componants.
Remove the thermostat and inspect
Check if there are dusts or chips in the thermostat valve.
Check adherence of the thermostat.
Clean the thermostat valve and reuse the thermostat.
Replace the thermostat, if it doesn't work properly.
Heated excessively
Engine overheated
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 DTCs
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.
After removing the thermostat, check it works properly.
※ Check the thermostat opens at the valve opening temperature.
Replace the thermostat, if it doesn't work properly.

Thermostat Inspection
1. Immerse the thermostat in water and gradually heat the water. 2. Check the valve opening temperature. Valv ...

Water pump Components
1. Water pump pulley 2. Water pump 3. Water pump gasket 4. Water pump housing 5. Water pump housing gasket 6. O-ring 7. Water inlet pipe ...

See also:

Water Temperature Control Assembly Components
1. O-ring 2. Water temperature control assembly 3. Water inlet fitting 4. Engine coolant temperature sensor 5. Thermostat 6. Thermostat gasket 7. Oil cooler coolant ho ...

Rear Differential Carrier Reassembly
Pinion drive gear height adjustment Adjust the height of the drive pinion in the following order. 1. Below are the special tools to measure the pinion height ...

Hands Free Switch Installation
1. Install the handsfree remote switch to the steering wheel front cover. 2. Install the steering wheel front cover. 3 ...

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