Radiator Overflow Tank

The current trend of engine downsizing while pumping out more power than before has a few knock-on effects. The higher that rated power the higher the generated heat. A large portion of this goes through the engine block, and another exits the car in the form of exhaust gas. These parts need to be made of materials that not only hold their own against high temperatures but also high pressures. In short, modern engines may be exemplary feats of advanced engineering, but they come under a lot of stress.