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Usually the rubber will be hard and cracking

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14y ago
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Q: How can you tell if you have a bad radiator cap?
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Why is my radiator cap not working?

Bad seal Bad spring Bad neck on radiator


When the car is running it pumps the coolant out of the overflow tank. It is a 1998 Cadillac Deville 4.6L engine. Do I have a bad radiator cap What are the symptoms of a bad radiator cap.?

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