Excessive heatĪnother reason the upper radiator coolant hose is too hard could be that it handles excessive heat. It shows that your vehicle has been running on a closed-position thermostat for a while, which stops the coolant from flowing. When the thermostat does not function or stops working entirely, it affects the condition of the hose. Damaged thermostatĪ water line goes from the radiator to the engine, where the thermostat is located. Once the hose is old, it becomes harder when cool, and this is when it needs replacement before the radiator hose collapses or blows. It shows how long it has been handling the coolant’s pressure and heat. The age of the hose contributes to how effective it will be. Over time, the build-up of heat and other forms of pressure will deteriorate the hose causing it to become weaker. There is a build-up of pressure in radiator hose, which it has to handle every time you drive your vehicle. Many factors could cause the upper radiator hose to be hard when squeezed, including the following. It signals that the hose needs to be replaced urgently to avoid coolant leakage in the engine. ![]() It may often soften, especially when hot coolants have just passed through it and later solidify.Ī hard upper radiator hose with a crunchy feeling is never a good sign. Over time, the top radiator hose may feel hard to squeeze, stiff and rigid. Top Radiator Hose Is Hard To Squeeze (Why) This blog post will examine the causes of hard top radiator hose when squeezed, how to tell if the hose is bad and provide answers to some of the most asked questions relating to top radiator hose. When the top radiator hose is hard to squeeze and overheating, it may be sign of other underlying issues. However, because of the coolant heat, the top radiator hose may solidify when it cools off and becomes more susceptible to breakage. The Top radiator hose carries coolant from the top of the radiator to the top of the engine.
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