Question about 2005 Kia Optima
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
I would have the thermostat replace that seem wat
the problem is
Posted on Apr 18, 2009
Try this procedure:
Posted on Apr 25, 2015
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Posted on Jan 02, 2017
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