Itzhaky Posted March 16, 2008 Report Share Posted March 16, 2008 Cadillac DeVille, '97, 230,000 miles. 8 month old radiator. Heating to 250 deg. Machanic said he put new water pump (I doubt it) and new thermostat. I flushed the entire system with Zerex Supper Flush and run water throughout the system with the thermostat out. Water runs freely. Yet, temp at idle goes to 250, but racing the rpm to >2000 lower the temperature. What gives? Link to comment Share on other sites More sharing options...
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