HI and thanks for using 2CarPros.
Does the hose run back to the radiator? Based on your description, it sounds like a radiator hose which runs from the radiator to the thermostat housing on the engine. Take a look through this link and see if it helps.
https://www.2carpros.com/articles/car-is-leaking-coolant
Let me know if that helps or if you have other questions. If possible, can you upload a picture of the hose in question? It would help me identify it.
Take care,
Joe
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Sunday, January 13th, 2019 AT 11:02 AM