What is the slow water temperature in the car?
It may be that the thermostat is always circulating, which causes the water temperature to rise slowly. Mainly check the following two aspects (whether it is a thermostat problem can be judged by the temperature difference between the water inlet pipe and the water outlet pipe of the radiator when the car is parked). Or go to the 4S store to check.
The reason why the engine water temperature is too low is that the thermostat cannot be closed due to the damage of the thermostat, or the cooling fan is in normal rotation. When the thermostat can't close the valve, the coolant keeps circulating and the engine water temperature drops rapidly.
The thermostat is actually a control valve, which controls the circulation of coolant in the cooling system, whether it is a large circulation or a small circulation. Large circulation refers to the flow path of coolant when the thermostat is opened.
Extended data:
Consequences of too low or too high water temperature in the car:
1. When the temperature is high in summer, it becomes difficult to dissipate heat from the water tank, the water temperature of the engine will rise to varying degrees, the rubber hose will soften more easily, and the cooling water will leak. Therefore, it is common that the water temperature is too high or even boiling during driving. Normal engine water temperature should be constant between 85-95 degrees Celsius. When the water temperature is too low, the fuel can not be atomized well when entering the cylinder, and the power and economy are not good. Moreover, the gap between parts is too large at low temperature, and the noise and vibration will be greater.
2. If the water temperature is too high, the viscosity of the engine oil will become thinner and the lubricating strength will decrease. At the same time, the piston, valve and other high-speed moving parts are more prone to deformation, resulting in engine weakness. In severe cases, the expanding and deformed piston will strain the cylinder, and the crankshaft bearing will dissolve and lock the crankshaft, with disastrous consequences. Therefore, if the pointer of the water thermometer is close to the red area, or the water temperature warning light is on, you should immediately pull over and check the flameout.
Installation method of thermostat:
In general, the thermostat is installed at the water outlet on the upper part of the engine. On the one hand, it is easy to maintain, on the other hand, it is easy to exhaust air when replacing coolant, so as to avoid the erosion of water pump by air.
However, the thermostat installed in the upper water outlet of the engine also has some disadvantages, that is, the engine is easy to oscillate during warm-up, which leads to frequent fluctuations in the engine temperature, which makes the fuel atomization of the engine good and bad, thus increasing fuel consumption, which will accelerate the wear of the engine for a long time and cause certain damage to the engine performance.
Another installation method is to install it at the water inlet of the pump, which is the confluence of hot and cold water and is a temperature-sensitive place. At this position, the thermostat has a small adjustment range and high adjustment precision, which will not cause the water temperature in the engine cylinder to fluctuate greatly and ensure the stable operation of the engine.
However, the thermostat installed at the water inlet of the pump also has disadvantages, that is, it is not easy to discharge air when replacing the coolant, which is easy to cause cavitation on the pump. What needs to be pointed out here is that when the thermostat installed at the water inlet of the pump is damaged, it must be replaced with a new thermostat in time, and the thermostat must not be disassembled.