Kia Cadenza: Cooling System / Thermostat Repair procedures

Kia Cadenza YG 2016-2025 Service Manual / Engine Mechanical System / Cooling System / Thermostat Repair procedures

Removal

Removal of the thermostat would have an adverse effect, causing a lowering of cooling efficiency. Do not remove the thermostat, even if the engine tends to overheat.

1.	Drain engine coolant so its level is below thermostat. (Refer to Cooling System - "Coolant")

2.	Disconnect the ratiator lower hose (A). (Refer to Cooling System - "Radiator Hose")

3.	Remove the water inlet fitting (A) and the thermostat (B).

Inspection

Immerse thermostat in water heated to over 95°C (203°F), then heat for at least 3 minutes to check valve lift.

•	Do not use water below 95°C (203°F).

•	Do not directly heat unit as this will damage thermostat.

Check the valve opening temperature.

Valve opening temperature:

88±2°C (109.4±3.6°F)

Full opening temperature: 100°C (212°F)

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

Check the valve lift.

Valve lift : 10mm (0.3937in.) or more at 95°C (203°F)

If the valve lift is not as specified, replace the thermostat.

Installation

Place the thermostat in thermostat housing.

(1)	Install the thermostat with the jiggle valve upward.

(2)	Install a new thermostat (B).

Install the water inlet fitting (A).

Tightening torque :

9.8 ~ 11.8N.m (1.0 ~ 1.2kgf.m, 7.2 ~ 8.7lb-ft)

3.	Connect the ratiator lower hose (A).

4.	Install the ratiator upper hose. (Refer to Cooling System - "Radiator Hose")

5.	Fill with engine coolant.

6.	Start engine and check for leaks.

Thermostat Components and Components Location

Components 1. Water temperature control assembly2. Thermostat3. Water inlet fitting pipe ...

Thermostat Troubleshooting

Troubleshooting SymptomsPossible CausesRemedyCoolant leakage • From the thermostat gasket Check the mounting bolts • Check the torque of the mounting bolts • Reti ...

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