Question about 1997 Cadillac DeVille

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Car over heats

Has new raditior waterpump and theromostat still over heats

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Check and see if the Radiator cooling fan is working. It should cycle more or run continuously when the AC is on. There are often 2 heat sensors for the Temperature, 1 is for the gauge and the other is for the Radiator fan.

Just having water flow is not enough to cool the engine, the electric Radiator fan makes a big difference. There should be a Relay in the Powerbox. You can get Diagrams for the wiring at Autozone.com when you register for FREE. Then you will be able to tell what is in the Powerbox and get chassis wiring diagrams.

Since you had a new radiator installed, there is a possibility that the electric fan was not reconnected.

Posted on Feb 11, 2012

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