stop driving your car immediately.
my wifes 2003 serento did the same thing she was low on antifreeze.
after filling (1 gallon low) i looked for a leak and found it on the bottom of the plastic radiator bottle (under pressure) replaced it myself at a cost of 120.00 from kia. this appears to be common over 60,000 but kia will not acknowledge this problem and if your engine over heats and has damage kia will not warrenty the motor
please let me know if this was the problem
Last edited by GARBEAR; 12-10-2006 at 08:54 AM.