Question about 2005 Kia Optima

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Overheating?? Hi, I have an 05 kia optima and it has overheated on me a couple of times the last time was yesterday I was in a drive through and I watched the temp guage start going up to the hot mark. I got my food and turned the car off for about 10 min. I started it and it was cooled off to normal and drove it home about 15 miles with no other problem. I do smell what I think is coolant when the car is running. It's weird because it overheats and them it dosn't?? Can you help? Thanks

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I had the same problem, it was the thermostat.

HOWEVER - also check that the fans come on, that you've got plenty of antifreeze, no leaks, etc.

From the erratic nature of the overheat, it's likely the thermostat.

When you take the old thermostat out, check and see if (after running it under cold water) opens up in a pot of hot water. Mine wouldn't.


Posted on Apr 22, 2009

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I would have the thermostat replace that seem wat
the problem is

Posted on Apr 18, 2009

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Try this procedure:

  • The thermostat can be stuck close. If you feel the upper hose very hot and the lower hose cooler than normal, it may be a stuck thermostat.

  • Make sure the radiator and the overflow bottle are filled to the proper levels.

  • Bleed air from the coolant system:This is best done by running the engine with the radiator cap off until you see when the air bubbles stop coming up.

  • Check the radiator fans: The easiest way is to turn on the cars air conditioner and turn up the A/C fans. Both radiator fans should come on when the A/C starts

  • Make a pressure test by using a pressure testing tool (available at most auto parts stores). Use the pressure shown on your radiator cap. Most cars are 16 PSI or less, so don't exceed that pressure. Replace the radiator cap if it doesn't hold the pressure.

Posted on Apr 25, 2015

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Hello, donartias888 and thank you for asking your question on Fixya!

Here is a simple process that will walk you through a few steps that will pinpoint the overheating problem on your
2006 Kia Optima, without even using any tools. It has helped millions of people, and I am certain that it will help you, because I wrote it for people in your exact situation.
How to diagnose your overheating
2006 Kia Optima

Get more great money saving tips and tricks about your vehicle from: twitter.com/acoates23234

Thanks for the vote, and good luck!

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