replaced the ac compressor dryer and offer tube toped off antifreez. why does it run hot with my ac on and when its off it doesnt
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1999 Cadillac DeVille Question: replaced thermo and waterpmp why does it run hot?
ck coolant level again and then ck aux cooling fan operation
Answer #2Chevy Power July 24, 2012, 06:21Journeyman
When you say it runs hot, at what temperature is it running at? Are you seeing the temperature on the gauge or did you measure the actual temperature at the thermostat?
Answer #3doctorfixit July 24, 2012, 11:00Rookie
check aroud your top radiator hose, see if there is a bleeder valve for bleeding outair in your cooling system, if air is traped in system the engine will over heat