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run it without radiator cap on til it pukes.. top it off and close cap..test drive ..do fans come on at 240 degrees approx? test with A/C on to see if fans are operating ..if still getting hot thermostat is suspect or radiator restricted.. or internal engine issues
If the cooling fans are not coming on when the vehicle is overheating try this.
Look for the coolant temp switch B. it will be located near the thermostat housing on the back side of the passenger side of the engine (follow the lower hose to the engine). It will have a white with green wire and a black wire. Unplug it, turn the key to the run position, the engine does not need to be running. ground the white with green wire. if the fans come on replace the coolant temp switch B sensor.
well what temp has the car ran in in the past has it always ran at that temp if its not in the red then i wouldn't worry
if it has not always ran that hot then id get it checked out it could be a bad thermostat or radiator fan not kicking on early enough or fan temperature sensor getting lazy and not kicking fan on correctly
if u want it to run a little cooler then just put a cooler thermostat in it
The first thing is to make sure the coolant is full, check it when the engine is cool, check radiator level, if coolant is full then check for bad thermostat, run engine and as it overheats check both hoses to make sure they are both hot, if one is hot and the other warm then you will need to replace the thermostat.if both hoses are hot then you may have a bad cooling fan or sensor, hope this is helpful.
Thermostat is clogging, water pump failure, air in cooling system, a leak in the hose. These are the obvious issues concerning overheating. Hopefully its not a blown head gasket. There is a 30 dollar diagnostic you can have run and the mechanic will tell you if its a blown head gasket. I should know. I have a bmw and i didnt get diagnostic and bam head gasket was way warped. Cost me 2200 for head gasket repair. This is what I recommend you do. Also you could run vehicle without thermostat and see what happens. if it dont over heat then it was thermostat.
If you gauge is readin g that high, you are over heating, maybe not to the point of engine shut down or hose failure. I suspect the thermo sensor that is mounted in the radiator is not operating, therefo causing the cooling fan not to function at high temps.
I recommend you have this checked quickly.
faulty temperature sensor. It's near where the thermostat lives in the motor. In an emergency you can wire the + side of the fan to the accessory panel, just know that the fan will run the entire time the car is on.
May be, Your coolant machine is working too hard.. Because when hot/summer day , if my machine in long journey , and you resting your car , the fan sound is still on although you turn off your machine.. It's means, the coolant machine , or your engine component must be changed... I hope so.