Question about 2005 Kia Optima

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I have a 2004 Kia Optima and about a week ago it started overheating. We replaced the thermostat and still the same problem. It happens mainly after running the air conditioning but now it has started happening both with the air on and off. Nothing is leaking so I am stumped.

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  • Draks76 Oct 03, 2008

    I have the exact same problem. I guess I won't replace the thermostat since that wasn't your problem and I'll look at the water pump maybe being the culprit. I just had my radiator flushed so it shouldn't be a clog, and the fans run just fine.

  • Anonymous Oct 25, 2008

    hey guys, it sucks, i got the same problem, at the time i'm replacing radiator, let me know if your h2o pump helps, i've also in the past changed my temperature sensor, not it...

  • sawzall2 Nov 29, 2008

    Hey, how did the radiator replacement go? I'm in the same exact boat and have removed the radiator but am trying to figure out how to fit in the replacement.
    KIATechInfo says to take the whold fan/rad assembly out, they also skip several steps like "take the condenser bolts off" and other fun stuff that turns out is necessary.
    Anyway, I was able to get the rad out but had to remove the fans first, I don't remember how I got the bigger driver side fan out but I'll be damned if I can get it back in. Too much **** in the way.
    I have an 01 optima which should be the same as any other Optima 01-06.0 (not 06.5). If I would have known I couldn't take the fans out with the rad I wouldn't have gone underneath to remove the hoses....
    Anyway, how did you jimmy those fans back in there?

  • Jennifer0258 May 13, 2009

    My 04 Kia Optima Lx is overheating too. I've replaced the thermostat and the water pump and still overheating


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Sucks guys, i have the same problem, at the moment i'm replacing my radiator, just dropped in on a break :)
if it does stop overheating i'll let you know, i've also changed temperature sensor, not it...

Posted on Oct 25, 2008

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I have a 2005 Kia Optima and I have a heating problem. Wnat to change the radiator first (it is leaking from tank on top of radiator). What steps to take ??o

Posted on Jan 02, 2009

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