Thank you for the updates. Water pumps don’t build pressure, they create volume. Pressure is created by a resistance to flow, not volume. If you’re not overheating and the fans are working correctly, then you’re probably fine. Don’t go looking for problems if there aren’t any. However, I don’t think replacing the radiator cap is a bad idea. That will do more for the upper hose than a water pump would. Even so, the upper hose does not have to be firm for the system to work correctly.
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