How do I replace water pump in Volvo 740?

To replace the water pump in a Volvo 740, 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 if applicable. Unscrew the old water pump, clean the mounting surface, and install the new pump with a new gasket. Reassemble everything in reverse order, refill the coolant, and check for leaks.