Turning off the engine directly when the car's water temperature is too high is a wrong behavior. When the car's water temperature is too high, first slow down, then pull over to the side of the road. Do not turn off the engine immediately, because excessively high water temperature will cause the piston, cylinder walls, cylinder, crankshaft, etc., to overheat, thinning the engine oil and losing its lubricating effect. If the engine is turned off immediately at this time, the mechanical parts are in an expanded state, and the gaps between various components are very small, which may cause some soft metals to peel off or even lead to cylinder sticking. Reasons for excessively high water temperature: 1. Insufficient coolant: First, check the coolant level. If you are on a highway or in a remote area and there is no coolant in the car, you can temporarily use water as a substitute. Note: Do not open the radiator cap or water tank cap immediately after stopping the car, as the internal pressure is too high, and opening it may cause instant spraying, which can easily lead to burns. 2. Dirty radiator: The radiator has many pores formed by cooling fins, which are prone to being clogged with fluff, sludge, etc., reducing ventilation and cooling efficiency. In winter, poor cooling efficiency is not a big problem because the ambient temperature is low. However, in summer, when the ambient temperature is already high, a clogged radiator with poor cooling can easily cause the water temperature to rise.
