Radiator hose collapsed?

2002 MERCEDES BENZ ML500
140,000 MILES • V8 • 4WD • AUTOMATIC
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BHAMDOC1973
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Very cold here today. Didn't notice if it did it before or not, what can cause upper radiator hose to collapse?
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Dec 1, 2024 at 10:27 AM
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STRAILER
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This happens when the radiator cap needs to be replaced. It is not allowing coolant to flow back into the engine once cooled. Let us know if you need anything else.
Dec 1, 2024 at 12:57 PM
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BHAMDOC1973
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Hmm. Never seen that or heard that before. Thanks. I'll read more about it to understand it.
Dec 1, 2024 at 1:20 PM
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BHAMDOC1973
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And if radiator doesnt have a cap , then its the cap for the expansion tank?
Dec 1, 2024 at 1:22 PM
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STRAILER
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Yep.
Dec 2, 2024 at 9:37 AM
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BHAMDOC1973
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it gets full once car is running. I'll buy a cap. thanks
Dec 14, 2024 at 8:15 PM