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Coolant Temperature Diagnosis! Why is my Car Overheating? 3 Reasons Why HERE!


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Here are some reasons listed for you to help diagnose your coolant temperature reading HOT and to help you to understand, “Why is my Car Overheating.” This Summer is going to be hot this year and your car will let you know by showing you your coolant temperature gage or light by illuminating it. Here are the top 3 reasons why your vehicle will suddenly read Hot!

1. Your car is low on antifreeze due to leaks or coolant evaporation
2. Your cooling fan is not turning on and cooling down your motor
3. Your car’s thermostat is stuck in the closed position not allowing the antifreeze to circulate

When your car is low on antifreeze it will not have the proper amount of coolant needed to cool down your hot motor. Make sure that your radiator and your coolant reserve bottle is full all summer long. The best fix for this is to have your auto mechanic perform a, “Coolant Pressure System Test.” He or she will pressurize your cooling system normally to about 20 pounds and inspect your cooling system for leaks. This test should run around $30-$50 and should only take about 20-30 minutes to perform for you. At the end of the test they will inform you where all of your leaks are located and how much it will cost to fix them.

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Your Cooling Fan’s job is to come on around 220 degrees and cool down your coolant and your hot engine to around 190 degrees then shut off automatically. There are a few things that could happen that will not allow this coolant fan to operate like it should. The items that could go bad are your coolant fan switch, a bad coolant fan electric motor, a bad relay or a fuse leading to the fan motor. To perform a proper test for this you or the auto mechanic will need to monitor the engines temperature and watching for the fan operation at the same time.

Stant 45359 SuperStat Thermostat - 195 Degrees Fahrenheit
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Your Vehicle’s Thermostat is suppose to open and close according to the engines temperature. For instance, the thermostat will be and remain closed until your motor reaches the proper operating temperature. If your car or truck is overheating because of this your thermostat will remain closed all of the time causing your engine’s temperature to get Hot fast. The Thermostat is only a few dollars and should be replaced at least once per year.

I hope these 3 tips on coolant temperature diagnosis will help you to understand why is my car overheating. For more auto repair tips and advice please visit my Blog at, “Auto Repair Savings And my Special Links.” -The Autodude-

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