Question about Heating & Cooling
This valve opens and closes according to room temp. Make sure that valve is set and operating properly. If so that radiator may be air locked and should have a bleeder valve on the top somewhere. When you open it air will come out until water, let it bleed water out for a couple of minutes. I hope this helps you.
Posted on Oct 24, 2008
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Posted on Jan 02, 2017
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Thermostat Operation:The automotive thermostat is a temperature controlled on and off valve. When the temperature rises to a predetermined temperature, the thermostat opens up to allow the engine coolant to flow through the cylinder block and the radiator. This flow is crucial to maintain optimum operating temperature for fuel efficiency, enhanced driveability, and engine protection. The coolant flow is reduced when the engine is cold, and the flow is increased when the engine is hot. Contrary to popular opinion, operating the vehicle without the thermostat doesn't make the engine run cooler. It will actually run hotter because there isn't a thermostat to slow the coolant flow. This means the coolant doesn't stay in the radiator long enough to dissipate its heat.
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