Question about 2001 Cadillac DeVille
This cna be normal. The Northstar engine has design issues that manifest as overheating problems, but mainly under hard accelleration...
What you describe sounds like normal fan cycling...are the fans going on and off?
Posted on May 30, 2010
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Posted on Jan 02, 2017
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Add a mixture of one-half water and one-half antifreeze to the radiator. Fill it right up to the top.
Fill the overflow/coolant reservoir with the same 50/50 mixture.
Leave the radiator cap off, turn the engine on and let it run until the radiator "burps": You will see the coolant level drop and may see or hear a large air bubble come to the top as the system burps.
Keep an eye on the temperature gauge throughout this process.
Refill the radiator to the top and coolant reservoir as needed.
Put the radiator cap back on.
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