I. Reasons
1, insufficient coolant. The owner can check whether there is water leakage in the water tank, resulting in insufficient coolant. If there is no leakage, replenish the coolant in time. If there is leakage, replace the water tank.
The thermostat is broken. When the thermostat is damaged, the water pipe will not run normally in the large and small cycles, and the temperature of the water tank will be too high.
3. There is something wrong with the cooling fan. If the cooling fan of the car does not rotate, the temperature of the water tank cannot be transferred without cooling, which naturally causes the temperature of the coolant to rise, leading to the phenomenon of "boiling".
The circulating water pump is out of order. The common fault of circulating water pump is that the impeller cracks or falls off on the pump shaft, which leads to the abnormal circulation of the cooling system and the high water temperature.
Second, the water temperature alarm light is on. solution
1, the optimal water temperature is about 90 degrees when driving. If it is overheated, it may boil, which is commonly known as boiling. It is not advisable to continue driving after the water temperature warning light on the dashboard lights up. After the water temperature drops, you can stop and drive to the maintenance station for inspection and maintenance.
When the water temperature is too high, start to slow down and then drive to the side of the road. Don't turn off the engine in a hurry. Because the water temperature is too high, the temperature of piston, steel wall, cylinder and crankshaft rises. Will be too high, the oil will become thinner and lose its lubricating effect.
If the engine is turned off at this time, the parts are basically in an expansion state, and the gap between the parts is very small. After stopping, some soft metals may fall off, and some may even lead to cylinder sticking. Therefore, it is found that after the boiler is turned on, it is not necessary to turn off the engine immediately, but to temporarily keep idling and try to cool down.
3. Don't pour cold water on the engine during cooling, which may cause the engine block to burst due to sudden cooling. A good method is to put on gloves, then add a folded wet cloth on the water tank cover, gently unscrew a small crack on the water tank cover, wait for the steam to slowly drain out, and then replenish cooling water or coolant after the water tank pressure drops.
When the owner finds that the water temperature warning light is on, it is best to find a place to park in time, and don't turn off the fire directly. First, check whether the coolant in the water tank is insufficient. If it is other fault problems, you need to wait for the water temperature to drop before going to the nearest repair shop, so that professional maintenance personnel can handle and repair the faulty parts.