I ran it for the above water pump and timing belt replace with drain and fill of coolant. The problem I see is that it linearly adds the times. Thus not taking into account to replace the water pump you in effect have to replace the timing belt. A water pump replacement including the drain and fill is estimated for 3.1 hours. The timing belt alone is 2 hours. Both services together are estimated at 5.1 hours. An good independent shop would hopefully bill you for hour on the car (or some close approximation). The dealer is likely to use the time estimates provided by Volvo (This helps you if the mechanic runs into problems and it takes longer, but it also means that a skilled mechanic can get paid more for working efficiently by having more billable hours than they actually worked).Pretty neat ^^. Wonder how accurate it is?
You might end up along side the road with a leaky water pump. (The same outcome is possible with a new water pump, however with a new water pump the probability is less. I do not know what the MTBF of a volvo water pump is, so it is hard to quantify how much less the probability is) If you happen to catch the leak before your temperature gauge climbs then you are only out a water pump, if you don't catch it in time then you might need a new engine.What risk is there if I wait to replace the water pump 3 years down the road?