One way to tell a bad thermostat in a car is if the car overheats frequently even if there is water in the radiator.Stuck open - no heat from heater, temp gauge hardly moves off of cold.
Stuck closed - overheats engine, temp gauge quickly climbs to hot.listen for any rubbing, grinding, or whining noises from the pump. look under water pump while running, if pump is going bad. water will come out of weep hole on the bottom of the pump. good-day!
SOURCE: 2003 kia sedona over heating and no heat
This Problem is Usually Caused by a Malfuntioning Thermostat. Change the Thermostat and let me know what you get. Please Rate My Solution, I Need all the Help That I can get! Thanks!
SOURCE: 2003 kia sedona over heating and no heat
OOPS ,big mistake ,did you turn engine over with a rachet first to make sure valves cleared pistons
SOURCE: I have a 2004 Kia Sorento that is leaking antifreeze
could be one of the two radiator hoses. There are also two hoses in back that go to the heater core. All of these connections attach to plastic nozzles on the radiator and also the ones on the heater core are plastic and can crack. Also check radiator condensor for leaks.
SOURCE: I have a 2003 KIA Sedona and it is overheating
If you are not losing coolant the first things to check are if the fan(s) are engaging and if the thermostat is opening. Start the engine cold and monitor the temperature as it warms up. As it starts to get hot, Gently and carefully grab the upper radiator hose. If it is cool to the touch but the engine is hotter than normal the thermostat is stuck closed and needs to be replaced. At the same time listen and watch for the cooling fan to engage. You should have 2 electric cooling fans. One works off of coolant temperature and the other off of accessory load. Turn on the a/c during this test with the temperature setting on hot. This way you can see if the fan is working while you check the thermostat operation and the fan will engage and help cool the engine if it is operating properly. Feel the hose for breaks in the coolant flow, if the thermostat opens, to detect if air pockets are present in the system. if you have never opened up the cooling system for repair, there should not be any air in the coolant.
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You should check whether the cooling fan is working properly. The fan would need to be replace at around 60,000 km. it may not work properly especially when you
You should check whether the coiling fan is working properly. The fan would need to be replace at around 60,000km. It may not work properly especially when you are traveling at slow speed. Also check whether there are oil in the expansion tank, if there are you may have blown the gasket.
the expansion tank is brand new it was as replaced last month i will check the fan
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