Kia Optima: Inspection - Thermostat. Repair procedures - Cooling System - Engine Mechanical System - Kia Optima TF 2011-2023 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:

Removal
1. Make sure vehicle does not roll before setting room side shift lever and T/M side manual control lever to "N" position. 2. Remove the battery and the bat ...

Tachometer
The tachometer indicates the approximate number of engine revolutions per minute (rpm). Use the tachometer to select the correct shift points and to prevent lugging the engine and/or overrevvin ...

Rear Body. Body Repair
Side outer panel rear corner Rear package tray trim mounting hole (Ø10) Rear transverse trim mo ...

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