Frank, do you hear that strange noise?
Yes, I noticed it a while ago. It seems to be coming from the engine.
What should we do?
I don't know. Perhaps we should slow down and stop at the next parking lot to see what the matter is.
OK. Let's do that.
Oh, it is red hot! We have run out of water.
How is the engine itself? Is it OK?
I think it's alright. Let's wait till it cools down a bit and then add some water.