Kia Optima: Inspection - Thermostat. Repair procedures - Cooling System - Engine Mechanical System - Kia Optima TF 2011-2026 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:

Replacement
1. Disconnect the negative (-) battery terminal. 2. With the (-) driver, remove the photo sensor (A) from the center of defrost nozzle. 3. Ins ...

Components and Components Location
Component Location 1. Audio unit 2. Midrange speaker 3. External amplifier 4. Glass antenna (AM/FM) 5. Front door speaker 6. Rear door speaker 7. Woofer spe ...

Main components of ODS
A detection device located within the front passenger seat track. Electronic system to determine whether passenger air bag systems should be activated or deactivated. A indicator light locat ...

Copyright www.kiopman.com 2026