Hyundai Tucson: Cooling System / Thermostat Repair procedures

Removal and Installation
   
Disassembly 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.
2.
Disconnect the radiator lower hose (A).

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

Tightening torque :
18.6 ~ 23.5 N.m (1.9 ~ 2.4 kgf.m, 13.7 ~ 17.4 lb-ft)

4.
Installation is reverse order of removal.
   
•
Install the thermostat with the jiggle valve upward.
•
When assembling the thermostat, place the thermostat on the housing with a protrusion of thermostat matching with a groove of the housing and install the inlet fitting. Be careful the thermostat doesn’t get out of the groove on the housing.
•
Clean surface on the rubber packing contact surface.
5.
Fill the engine coolant.
6.
Start the engine and check for leaks.
7.
Recheck the coolant level.
Inspection
1.
Immerse the thermostat in water and gradually heat the water.

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 Troubleshooting
Troubleshooting Water Pump SymptomsPossible CausesRemedyCoolant leakage • From the bleed hole of the water pump Visually check • Check leaks after about ten-minute warming up. • ...

Thermostat Troubleshooting
Troubleshooting SymptomsPossible CausesRemedyCoolant leakage • From the thermostat gasket Check the mounting bolts • Check the torque of the mounting bolts • Retighten the bo ...

Other information:

Hyundai Tucson (LM) 2010-2015 Service Manual: Schematic Diagrams
Schematic Diagram Canister The Canister is filled with charcoal and absorbs evaporated fuel vapor from the fuel tank. The gathered fuel vapor in canister is drawn into the intake manifold by the ECM/PCM when appropriate conditions are set. Purge Control Solenoid Valve (PCSV) The Purge ...

Hyundai Tucson (LM) 2010-2015 Service Manual: Photo Sensor Description and Operation
Description 1. The photo sensor is located at the right of defrost nozzle. 2. The photo sensor contains a photovoltaic (sensitive to sunlight) diode. The solar radiation received by its light receiving portion, generates an electromotive force in proportion to the amount of radiation ...

© 2010-2026 www.htmanual.net