Hyundai Sonata: Thermostat. Repair procedures - Cooling System - Engine Mechanical System - Hyundai Sonata YF 2011-2019 Service ManualHyundai 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 1.5C (179.6 2.7F)
Full opening temperature : 95C (203F)

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 95C (203F)

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 of ...

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

    See also:

    Windshield washers
    In the OFF position, pull the lever gently toward you to spray washer fluid on the windshield and to run the wipers 1-3 cycles. Use this function when the windshield is dirty. The spray and wi ...

    Rear Cross Member. Repair procedures
    Replacement 1. Remove the rear wheel & tire. Tightening torque: 88.3 ~ 107.9 N.m (9.0 ~ 11.0 kgf.m, 65.1 ~ 79.6 lb-ft) ...

    Trip Switch. Repair procedures
    Inspection 1. Check the audio remote control switch for resistance between No.3 and No.5 terminals in each switch position. Switch ...