The time it takes to change a vehicles water pump is between 1 and 3 hours depending on the vehicle.
If the water pump is easy to get to then the water pump could be replaced within 1 hour.
If the water pump is buried under many other things and you have to remove all those things to get to the water pump then replacing the water pump may take you 3 and even up to 8 hours.
If you've replaced a water pump before then you'll usually be able to do the work faster but if not then it might take some work and learning to get the old water pump off and the new water pump on.
A good auto repair should should be able to replace the water pump within 1 to 3 hours once they begin working on your vehicle.
Replacing a water pump on a vehicle can cost from $20.00 to $100.00 for the water pump and then another $100.00 to $500.00 for the labor.
The harder your water pump is to remove and replace the more the shops labor is gonna cost you.