thermostat replacement

2003 KIA OPTIMA
200,000 MILES • AUTOMATIC
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CHRISTY MILLER
  • MEMBER
  • 1 POST
I have a 2003 Kia Optima LX and I'm trying to find out how to change the thermostat on it.
Jun 23, 2017 at 10:12 AM
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STRAILER
  • CAR REPAIR CONTRIBUTOR
  • 54,361 POSTS
Hello,

You must start by draining the coolant. Here is a guide, video and diagram (below) to show you how to get the job done.

https://www.2carpros.com/articles/replace-thermostat

and

https://youtu.be/skrwyPSkdTA

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed. Cheers, Ken
Jun 26, 2017 at 11:34 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.