KIA Niro: Thermostat Repair procedures
Removal and
Installation
Warning
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.
- Remove the engine room under cover.
(Refer to Engine and Transaxle Assembly - "Engine Room Under Cover")
- Drain the coolant.
(Refer to Cooling System - "Coolant")
- Disconnect the radiator lower hose (A).
- 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)
- Remove the thermostat (A).
- Install in the reverse order of removal.
Warning
- 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.
- Fill the engine coolant.
(Refer to Cooling System - "Coolant")
- Start the engine and check for leaks.
- Recheck the coolant level
Inspection
- Immerse thermostat in water heated to over 95ºC (203ºF), then heat for at least 3 minutes to check valve lift.
Warning
- Do not use water below 95ºC (203ºF).
- Do not directly heat unit as this will damage thermostat.
- Check the valve opening temperature.
If the valve opening temperature is not as specified, replace the thermostat.
Valve opening temperature : 88 +- 1.5ºC (190.4 +- 34.7ºF) Full opening temperature : 100ºC (212ºF)
- 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 100ºC (212ºF)
Troubleshooting
READ NEXT:
Water Temperature Control Assembly
Removal and Installation
Water Temperature Control Assembly
Disconnect the battery negative terminal.
Loosen the drain plug, and drain the engine coolant. Remove the
reservoir cap to help drain the coolant
faster.
(Refer to Cool
Heater Pipe | Active Air Flap (AAF) Repair procedure
Disconnect the battery negative terminal.
Loosen the drain plug, and drain the engine coolant. Remove the reservoir cap to help drain the coolant faster.
(Refer to Cooling System - "Coolant")
Remove
SEE MORE:
Fuel Pressure Sensor (FPS)
Description
Installed on top of the low pressure fuel pump, the Fuel Pressure Sensor
(FPS) measures the pressure
in the low pressure fuel line.
Based on the fuel pressure measured by the FPS and the amount of fuel consumed,
the fuel pump
co
Service Point Target Auto Calibration (SPTAC) Procedure
Install the SST (09964-C1200) on the roof center above the vehicle's
front windshield.
Have the laser illuminate starting from the roof center and to passing
through the emblem center.
Warning
The level laser must be se
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