When you replace the timing belt (every 70,000K).
http://www.volvoclub.org.uk/faq/WaterPumpChange.html
How often should you change water pump in a boat
The impeller in a Volvo Penta is located inside the water pump. You will need to first remove the water pump to access it.
When it fails. There is no proscribed interval for vehicular water pump replacement. On many, if not most, vehicles the water pump lasts longer than the usable life of the vehicle itself.
It's a good practice to change the water pump when you are changing the timing belt.
No
Yes, you should.
No You don't Need to change the water pump But you should change it and the thermostat if radiator was full of sludge. if not then no to both.
It's recommended to change the water pump at the time when you replace the timing belt.
If you have a V6 change the water pump when you change the cam belt at 105,000 miles. If you have a 4 cylinder then change it when it starts leaking.
I just had my fuel pump replaced at dealer for no cost whatsoever and they gave me a loaner! I have a 2002 Volvo s60 t5 and a Volvo v70 xc
behind the timing cover you should change the timing belt when you change water pump.