Question about Hyundai Motor 2004 Sonata

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Overheating. Ok I have a 2001 Infiniti I30.It has 80,000 miles now. The problem started when I noticed there was coolant coming out of the air vents into the cabin. Everything was fine. The car didn't overheat or anything. The A/C was cold. Absolutely nothing wrong. I took it to get it diagnosed and was told I had to replace the HEATER CORE since it was leaking. I managed to replace it myself. But now the car is over heating with and without the A/C on. I am positive everything was put back exactly like it was before. I took the car to Jiffy Lube to have the coolant drained and filled up again with new one. I also got the A/C charged with new gas . I have noticed that the radiator is always full with coolant. But the clear little gallon where you put coolant too is half full now. I have filled it up twice with more coolant. I checked to see if it was leaking but nope. This car has never overheated ever since I bought it brand new from the delership. What could be causing my car to overheat?

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1. Drain the coolant so its level is below the thermostat. 2. Remove the inlet fitting and gasket. 3. Remove the thermostat.Overheating. - 80d9d62.gif

Posted on Jun 21, 2008

  • Kleanthis Mavropoulos
    Kleanthis Mavropoulos Jun 21, 2008

    INSPECTION





    1.

    Heat the thermostat as shown in the illustration.



    2.

    Check that the valve operates properly.



    3.

    Verify the temperature at which the valve begins to open.





    Valve opening temperature : 80-84°C(176-183.2°F)


    Full opening temperature : 95°C(203°F)

  • Kleanthis Mavropoulos
    Kleanthis Mavropoulos Jun 21, 2008

    Or replace thermostat with a new one.

    INSTALLATION





    1.

    Check that the flange of the thermostat is correctly seated in the socket of the thermostat housing.



    2.

    Install the inlet fitting.





    3.

    Refill the coolant.

    Tightening torque
    Engine coolant inlet fitting bolt :
    10 ~ 15Nm (100 ~ 150kg.cm, 7 ~ 11lb.ft)

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