[Dynamix]

Hello guys,

I hope anyone of you can help me with my problem. Picked up my car from the shop and they told me my water pump is broken. I took the car back home and on the way it started overheating. I stopped instantly and let it cool down. Then I checked the coolant and it is not empty. Nontheless the warning light is on. On the rest of my way home the car did not overheat again. The temperature was ok (?????) at least when the temperature display is not wrong. It is strange that the engine is running pretty rough when idling. In the beginning when the engine was cold it was smoking pretty heavy. This disappeared after he got some temperature.

1st question: Is the water pump really broken?

2nd question: I checked the waterpumps on Rockauto and for some reason the most are pretty cheap. Only 2 waterpumps are not that cheap. Can anyone tell me why? What is the difference?