Kia Optima: Inspection - Thermostat. Repair procedures - Cooling System - Engine Mechanical System - Kia Optima TF 2011-2022 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 1.5C (179.6 2.7F)

Full opening temperature: 95C (203F)


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 95C (203F)
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:

Installation
1. Install the seat heater switch. 2. Install the power window switch. 3. Install the rear door trim. ...

Mirror. Repair procedures
Replacement Outside Rear View Mirror Replacement When prying with a flat-tip screwdriver, wrap it with protectiv ...

Electric Parking Brake (EPB) Repair procedures
Removal EPB Unit 1. Turn ignition OFF and disconnect the negative (-) battery cable. 2. Disconnect the EPB control unit connecter (A). 3. Remove the EPB control unit mounting nuts (B) ...

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