overheated again

[Triathlete]

If they put straight anti freeze in the mechanic should be shot...it should be a 50/50 ratio of anti freeze and water.
And yes I have seen new thermostats go bad. But it could be the pump also. A good shop should be able to test the water flow of the cooling system which can help narrow it down.

[zadam123]

forgot to mention i sometimes also smell antifreeze in the car even when its not overheating. dont know why?

[Triathlete]

Generally if you can smell anti freeze it means there is a leak. It may be a very small one. Also if you are smelling it when it is overheating it could be the steam releasing through the over flow container.