Too high water temperature is the most harmful, because the expansion of all components is set at 90℃ to achieve the best. The two parts cooperate with friction, because they expand with heat and contract with cold, the gap is large when the car is cold, and it will expand with heat, but only 90℃ is the best cooperation gap.
If the water temperature is too high, exceeding 90℃, the expansion of the parts will become larger, and the gap between the two parts will become smaller, resulting in greater friction. The most obvious is the piston and piston ring, which wear more with the cylinder after expansion, leading to cylinder pulling. A serious piston will get stuck in the cylinder and cause complete damage.
Extended data:
Hazards of low water temperature:
1, when the water temperature is low, the expansion of the parts is small, the fit clearance is too large, and the power is reduced. The temperature of engine oil also becomes lower and the viscosity increases, which increases the running resistance of the engine and affects the power output.
2. Low water temperature and poor gasoline atomization will lead to incomplete combustion, decreased power and increased fuel consumption. Because the engine wants to keep the water temperature normal, it will always be in a state of rich mixture and will always increase the fuel injection, which will also lead to an increase in fuel consumption and carbon deposition.
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Phoenix Net-What's the harm if the water temperature is too high or too low? Pay more attention to the water thermometer when driving.