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:

    Repair procedures - Revised
    Fuel Pressure Test 1. Release the residual pressure in fuel line (Refer to “Release Residual Pressure in Fuel Line” in this group). ...

    Rear combination lamp. Repair procedures
    Removal 1. Disconnect the negative (-) battery terminal. 2. Remove the rear combination lamp cover (A). 3. ...

    Front Repair procedures
    Replacement Front Seat Belt Replacement • When installing the belt, make sure not to damaged th ...