How long to change a water pump on a 1990 oldsmobile alero?

If you know what you are doing or have done one before you should be OK take your time clean the surface and do what you need to do hope this helps,How long to change a water pump on a 1990 oldsmobile alero?if you have experience with car repairs you could probably do your self in 2 or 3 hours maybe less if all goes wellHow long to change a water pump on a 1990 oldsmobile alero?long time