Hi ! need an advise please. My car's engine has been overheated because of the coolant leak. The lower radiator hose wasn't connected properly (I recently visited mechanic ) and it's got unplugged while I was driving. I noticed that the temperature is rising and engine light poped up, so I stopped. Plugged hose, fill coolant. How harmful this for the engine ? What can I check now to make sure it's functioning properly ?