Start the engine and warm up. Feel the upper and lower radiator hoses while it is warming up. You should feel heat suddenly in one of the hoses-usually the top hose. If it does not get hot but the engine get hoter than 1/2 way up the guage then you have a bad thermostat.
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Start the engine and warm up. Feel the upper and lower radiator hoses while it is warming up. You should feel heat suddenly in one of the hoses-usually the top hose. If it does not get hot but the engine get hoter than 1/2 way up the guage then you have a bad thermostat.