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Home >> Kia >> 2004 >> Optima L4-2.4L >> Repair and Diagnosis >> Engine, Cooling and Exhaust >> Cooling System >> Thermostat >> Service and Repair
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Thermostat: Service and Repair






REMOVAL
1. Drain the coolant to the thermostat level or below.
2. Remove the Engine coolant outlet fitting and gasket.
3. Remove the thermostat.

INSPECTION





1. Heat the thermostat as shown in the illustration.
2. Check that the valve operates properly.
3. Check to determine the temperature at which the valve begins to open.
Valve opening temperature 80.5 - 83.5°C (176.9 - 182.3°F)
Full opening temperature 95°C (203°F)

INSTALLATION
1. Check to ensure that the flange of the thermostat is correctly seated in the socket of the thermostat housing. If the thermostat is installed in the wrong direction, the bottom of the thermostat will touch the rib inside the intake manifold, making it impossible to seat flange in position.
2. Install a new gasket and engine coolant outlet fitting.
Tightening torque
Engine coolant outlet fitting bolt 10 - 15 Nm (100 - 150 kg.cm, 7 - 11 ft. lbs.)
3. Refill the coolant.
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