It is rare for a water pump to stop pumping, even if they are leaking, they are still pumping as long as the belt is there and tight. I would change the thermostst first. There are a few water pumps out there that have a plastic impeller and I have seen them break apart but that is rare.
May have a bad water pump, otherwise make sure your coolant system has pressure. this can cause over heating.
no.
look at the water pump right behind it is the water inlet to radiator just remove two bolts and pull out old themostat new themostat will also have directions with pics probally
You cannot repair the water pump. It needs to be replaced.
Test your water for TDS and calcium hardness to decide if water needs to be replaced.
It can be something as simple as that they are broken and needs to be replaced. Or the internal spring holding it could have worn out as well and also needs to be replaced.
it mounted in the water pump on the lower radiator hose
Your car will most likely overheat because the water will not circulate properly
The thread on the tap has broken and needs to be replaced.
The head gasket has blown and needs to be replaced.
There is a small hole in the bottom that is designed to leak when the water pump bearing is goin out
just under the themostat tucked behind the plastic puley