Which of the following are signs of a failing water pump?

The signs of a failing water pump primarily include overheating of the engine, coolant leaks, or unusual noises. The water pump is essential for circulating coolant throughout the engine cooling system. When the water pump is failing, it can lead to a coolant leak, which can manifest as puddles under the vehicle or a low coolant level in the radiator. Overheating occurs because the coolant is not circulating properly, preventing the engine from maintaining an acceptable operating temperature. Additionally, a failing water pump may produce unusual noises such as grinding or whining, often indicating bearing failure or an internal mechanical issue within the pump itself. Recognizing these symptoms is crucial for timely intervention to prevent severe engine damage.

The other options provided do not directly pertain to the water pump's functionality or its failure signs, making them irrelevant in this context.