Question about 2003 Honda Civic

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Honda Civic Overheating

I have a 2003 Honda Civic EX and it continues to have an overheating problem. We have had the radiator, the radiator cap, the thermostat and the water pump replaced. Our mechanic is saying there is an internal leak, but he can't find it. He says that for some reason the coolant is not being sucked back into the engine correctly. Can you help?

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  • ijohnson00 Aug 20, 2008

    I've been having the exact same problem with my 2003 Honda civic.  My car will start to overheat after i've been driving on the freeway, or when i'm just driving around the neighborhood.  Also, when I turn on the heater, cold air blows out.  I have had my radiator and hoses replaced, but the same problem keeps occurring. there is about 75,000 miles on the thing, and they should run forever. any suggestions?

  • truck_dri248 Apr 17, 2009

    i have a 1991 honda civic does the same thing only thing differnt on the free way about 60mph it stats to overheat in about 6 minutes or less and it passed emissons perfectly

  • fur-fur May 01, 2009

    My 2003 Civic overheats when I come to a stop. It is fine on the freeway or as long as I'm driving at least 30 mph. When I idle for more than a minute it overheats. I had the radiator replaced and the head machined in January after the radiator was punctured. This week the thermostat was replaced, the fan switch, and whatever the thing is that reads the temperature. It is still overheating. Any ideas on what next???

  • Lindane May 11, 2010

    To check the heater core like was mentioned previously, check to see if you have good heat from the heater. At least 130 degrees F minimum

    Are you continually running out of coolant or is the car just overheating with no coolant loss?

    Does the car overheat driving around town, on the highway, or both? If only driving around town, check for cooling fan operation.

    Have you had recent engine work done? It is possible that the technician left an air bubble in the cooling system.

    Good Luck


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Replace radiator and hoses.

Posted on Oct 20, 2013

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Your heater core may have some blockage. try flushing out your whole system.

Posted on Aug 16, 2008

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