Kia Optima: Inspection - Thermostat. Repair procedures - Cooling System - Engine Mechanical System - Kia Optima TF 2011-2019 Service ManualKia Optima: Inspection

1. Immerse the thermostat in water and gradually heat the water.

2. Check the valve opening temperature.

Valve opening temperature: 82 ± 1.5°C (179.6 ± 2.7°F)

Full opening temperature: 95°C (203°F)


If the valve opening temperature is not as specified, replace the thermostat.
3. Check the valve lift.

Valve lift : 8mm (0.3in.) or more at 95°C (203°F)
If the valve lift is not as specified, replace the thermostat.

Removal and Installation
Disassembly of the thermostat would have an adverse effect, causing a lowering of cooling efficiency. Do not remove the thermostat, e ...

Thermostat. Troubleshooting
Troubleshooting   Symptoms Possible Causes Remedy Coolant leakage • From the thermostat gasket ...

See also:

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Power Door Lock Relay. Repair procedures
Inspection Diagnosis With GDS 1. It will be able to diagnose defects of power door lock with GDS quickly. GDS can operates actuator forcefully, input/output value monitoring and self ...

OFF mode
Press the OFF button to turn off the air climate control system. However you can still operate the mode and air intake buttons as long as the ignition switch is in the ON position. ...

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