Question about Cars & Trucks
Posted by Anonymous on
A/c systems generate heat around the radiator. But, the antifreeze in the radiator should be able to be cooled down by the fan even when the a/c is on.
I would flush and fill the radiator system installing 50/50 antifreeze/water solution.
How bad is the car overheating? Is it on a gauge that tells you how much it is over normal operating temperature?
Posted on Jul 08, 2010
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Posted on Jan 02, 2017
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What you describe is quite normal. While the engine is running and the coolant is circulating the thermostat maintains the engine within its operating temperature range. When the engine is switched off there is still considerable heat within the engine and the coolant will continue to absorb this heat. With no coolant circulation, the coolant inside the engine will register a temperature rise to the extent your gauge measures. This temperature rise may persist for up to 15 minutes until the natural thermo-syphon of the cooling system starts to dissipate this heat build up and the engine starts to cool down. Because the cooling system is pressurised, the coolant is prevented from boiling off at this temperature above boiling point. Once the engine is restarted the coolant flow is re-established taking this excess heat from the engine and the system temperature returns to normal.
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