In advance, I would like to thank anyone who is willing to help me with my problem. I was wondering if I could have a blown head gasket or other serious repair. I purchased a used Range Rover 2004 today with 93000 miles from a private owner. The family was really forthcoming about any issues that the car has (Air Suspension inactive, mirror gear stripped, etc.). They informed me that they have recently replaced the water pump and fan clutch assembly. I test drove the car and then purchased it. Sooo, on my way home... rather a long distance of approximately 60 miles, the car was doing initially very well. However, almost home (5 miles out) the car dash indicated to check the gages, which I did. I noticed that the car had heated up to approximately half between hot and cool... thought that was ok. I kept driving and the gage climbed up towards getting hotter and the next thing I knew a HUUUGE smoke cloud came from under, what appeared to be the entire car, especially the hood area. I immediately pulled over and turned it off. It was a matter of only a few minutes between gages being between cool and hot and going further up and huge smoke cloud. I do not want the reader to think that I was driving the car for a long time while it was overheating. I called a toe truck as I was scared to add water/coolant myself (I know with engine cooled down and running, but still was scared). I have to admit something here that I think is important. Right before all began, I decided to accelerate REALLY fast just to see what it can do . I know that was probably stupid, especially because I am a woman and could have lived without doing that. I am aware that normally that should not affect anything, but with circumstances of recently having a water pump and fan clutch replaced, did I stress the engine too much that the heat knocked something lose? She is such a beauty and I was so proud of her, but now I'm looking at spending additional money to fix her :?. Please help. Any advice is appreciated.