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Theoretically it would run cooler. The temperature rating on a thermostat tells you it's fully open position. So when the coolant temp reaches 160 then coolant will be allowed to flow to the radiator. Where as the 190 will open 30 degress warmer. And generally a lower temp is better. Just make sure you replace it with the OEM for the winter... or your engine won't warm up enough when it's cold.

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โˆ™ 2004-07-21 11:54:43
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Q: Would a 396 Chevy run cooler with a 160 or 195 degree thermostat?
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