Question about 2003 Kia Optima
New thermostat is a good move. I don't know if your radiator is clogged, it's such a late model... but it's still a possiblility.
I would want to know if the water pump is working properly.
Sometimes with the engine COLD, I would remove the radiator cap and crank only for a moment or two... enough only to visually "see" inside the radiator, if there was some coolant "flow" going on.
Hope this helps... be safe!
Posted on Aug 28, 2009
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Posted on Jan 02, 2017
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