Kia Niro: Cooling System / Thermostat Repair procedures

Removal and Installation
  

Disassembly of the thermostat may have an adverse effect, causing deteriorated cooling efficiency. Do not remove the thermostat, even if the engine tends to overheat.

1.

Remove the engine room under cover.

(Refer to Engine and Transaxle Assembly - "Engine Room Under Cover")

2.

Drain the coolant.

(Refer to Cooling System - "Coolant")

3.

Disconnect the radiator lower hose (A).

4.

Remove the water inlet fitting (A).

Tightening torque :

18.6 - 23.5 N·m (1.9 - 2.4 kgf·m, 13.7 - 17.4 lb·ft)

5.

Remove the thermostat (A).

6.

Install in the reverse order of removal.

  

Install the thermostat with the jiggle valve facing upward.

When assembling the thermostat, place the thermostat on the housing so that the protrusion of thermostat matches with the groove of the housing and then install the inlet fitting. Be sure that the thermostat stays in the groove on the housing.

Clean surface on the rubber packing contact surface.

7.

Fill the engine coolant.

(Refer to Cooling System - "Coolant")

8.

Start the engine and check for leaks.

9.

Recheck the coolant level.

Inspection
1.

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.

2.

Check the valve opening temperature.

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

Valve opening temperature :

88 ± 1.5°C (190.4 ± 34.7°F)

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

3.

Check the valve lift.

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

Valve lift : 8 mm (0.3 in.) or more at 100°C (212°F)

Water pump Repair procedures
Removal    • Be sure to read and follow the “General Safety Information and Caution” ...

Thermostat Troubleshooting
Troubleshooting Symptoms Possible Causes Remedy Coolant leakage • From the thermostat gasket ...

Other information:

Kia Niro (DE HEV) Owners Manual: Warning messages
Warning messages appear on the LCD to warn the driver. It is located in the center of the instrument cluster. The warning message may appear differently depending on the type of instrument cluster and some may not show the warning message at all. The warning message is shown in either symbol, ...

Kia Niro 2017 (DE HEV) Service Manual: Intake Air Temperature Sensor (IATS) Description and operation
Description Mounted inside the Manifold Absolute Pressure Sensor, Intake Air Temperature Sensor (IATS) detects the intake air temperature. To precisely calculate the amount of air, correction of the air temperature is required as the air density varies with the temperature. So the ...

© 2016-2018 www.kniro.net