Question about 2000 Hyundai Elantra

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Car suddenly started overheating

My 2000 Hyandai Elantra started marking hot on a short trip to get lunch. I checked the obvious radiator fans & overflow resovoir. I let it cool down completely (okay, somewhat.) and then refilled it with water. Started it up and drove it down the street in an attempt to get it home. About half-way there it started marking "hot" once again. What could it be?

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  • albinothe3rd Aug 30, 2008

    I checked my radiator fans and they are both operating properly. But I did notice that when I filled the reservoir tank to the proper level and the car began to overheat. The water level remained the same and didn't get lower (a sign that water was being sucked in by the radiator from the reservoir tank). But I also realized the reservoir hose wasn't clogged when I loosened the radiator cap to relieve some pressure "WHICH IS NEVER RECOMMENDED!!". The fluid that was in the radiator began shooting from beneath the cap and from the reservoir overflow hose. I squeeze tested the pressure of the hose coming from the side of the motor to the bottom of the radiator with the car on. I felt no sense of water flowing and it was pretty easy to squeeze. When the same principal was applied to the other hose extending from the top of the radiator to the front of the motor. I felt water swooshing back/forth and it was more difficult to hold onto due to it's hotter temp. So do you still think it's the thermostat or do you think it could be the water pump? But it hasn't showed no signs of even getting slightly hot before this incident. It just happened. I actually drove it to work, went to cash my check, and finally on the way to get some lunch it just started marking hot. What would quit working in that short period of time?

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Radiator fan relay, radiator fan motor, failed thermostat, air bubble in radiator, clogged coolant tank reservoir hose

Posted on Aug 29, 2008

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Welcome to fixya

this could be cause by the thermastate or the fan could not be working i would replace the thermastate and check fan make sure it is running when the car heats up

Posted on Aug 29, 2008

  • victoria bennett
    victoria bennett Aug 30, 2008

    thermostat this sounds like





    if not then could be the water pump hope not though

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