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The thermostat is located inside the radiator. Remove the radiator cap and pull the thermostat up. Remember to put the replacement thermostat in the same position push the new thermostat down in the radiator. The O-ring gasket will automatically seal.

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โˆ™ 2015-07-15 20:06:26
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Q: How do you replace the thermostat located on a 1991 Pontiac Sunbird?
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