It is always difficult to keep an eye on the cooling of your kart's engine, especially when temperatures rise. In addition to the air temperature, that of the asphalt also affects it a lot, which can exceed 60°C in the summer, because the radiator, being mounted a few centimetres from the ground, is hit by the air it heats up. Many kart drivers, if they cannot keep engine temperatures under control, meaning around 48-50°C, get discouraged and resort to radical interventions, such as changing the radiator with a new model, that is perhaps larger, hoping for greater performance. In reality, sometimes small tricks are enough to improve, quite significantly, your system’s efficiency. In this article, Marco Malverti, owner of New-Line Racing, guides us in identifying the causes that can make the cooling system work badly and to correct the most common mistakes that are made, explaining how to intervene step by step. By acting on all of his advice, you could reduce the water temperature by up to 5°C, even in extremely hot climates.