How do you replace water pump on Volvo 940?

To replace the water pump on a Volvo 940, first, disconnect the battery and drain the coolant. Remove the serpentine belt and any components obstructing access to the water pump, such as the timing belt cover. Unbolt the old water pump, clean the mounting surface, and install the new pump with a new gasket. Finally, reassemble the components, refill the coolant, and run the engine to check for leaks.