Mechanics

ENGINE RUNS HOT

2000 Cadillac Deville

Engine Cooling problem
2000 Cadillac Deville V8 Two Wheel Drive Automatic 186000 miles

I have a 2000 Cadillac Deville, It will run hot if I drive around 70 miles per hour for a period of time or if I run the air conditioner, I will have to turn the air off and turn the heat on until the engine get back to its normal temp. I have replaced the water pump and the Thermostat and there are no leaks, what could cause this?
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CATO
June 17, 2008.



Check coolant fan operation
fan should come on and not allow the engine to over heat

BMRFIXIT
Jun 17, 2008.