It's recommended to replace the water pump along with the timing belt on Nissans, Hondas, some older and all newer Toyotas, and a few other cars. My parents put down nearly $800 to have the timing belt and water pump done on their Nissan Quest. Like DuckMuck said, when the pump goes south, the belt will get soaked in glycol and water, and the result is not good. The water pump is driven by the timing belt in Hondas and most Toyota V6/V8 engines.
1984 380SL-driving and service privileges.