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How toTroubleshoot car cooling system?

Updated: 8/16/2019
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16y ago

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Start with the basics. Turn the heater controls to hot. Remove the radiator cap and drain the coolant. Flush the system out with water. Replace the thermostat, and pour in a 50/50 mix of the proper Anti-Freeze and Distilled water. Replace any hoses that need replacing while doing this. Start the engine with the cap off and bleed all air from the system. Use bleeder valves if equipped. Keep the radiator full at all times. You should see water flowing once the thermostat opens. If not suspect a bad water pump. Once this is done, replace the radiator cap and turn on A/C. One fan should run. Shut off A/C and let engine run until it reaches operating temp. Watch the temperature gage and once it gets above mid point the fan should come on. If not check the fuse.

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Q: How toTroubleshoot car cooling system?
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