Hyundai Sonata: Thermostat. Repair procedures - Cooling System - Engine Mechanical SystemHyundai Sonata: 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 (C), gasket (B) and thermostat (A).

Tightening torque :
7.8 ~ 11.8 N.m (0.8 ~ 1.2 kgf.m, 5.8 ~ 8.7 lb-ft)

4.
Installation is reverse order of removal.
Install the thermostat with the jiggle valve upward.
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.

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.

    Water pump. Troubleshooting
    Troubleshooting Water Pump Symptoms Possible Causes Remedy Coolant leakage • From the bleed hole ...

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

    See also:

    Automatic heating and air conditioning
    1. Press the AUTO button. The modes, fan speeds, air intake and air-conditioning will be controlled automatically according to the temperature setting. Type A Type B 2. Turn the tempe ...

    Specifications
    Specifications Item Specification Type Motor driven power steering system(EPS) Steering gear Type Rack &am ...

    Road warning
    Hazard warning flasher The hazard warning flasher serves as a warning to other drivers to exercise extreme caution when approaching, overtaking, or passing your vehicle. It should be used when ...