There are many reasons why the car water temperature is too high. Most of them are caused by water pipe leakage and insufficient cooling water. Common ones include: broken fan belt, leaking water tank or water pipe, thermostat failure, engine oil leakage, etc. If the engine power disappears while the car is driving or there are violent knocking, cylinder knocking and other sounds, it is mostly because the engine is overheating.
The specific reasons are as follows:
The cooling fan does not rotate. The cooling fan may be controlled by a temperature control switch; it may also be controlled by a water temperature sensor.
Insufficient cooling medium. ① Antifreeze: High-end cars require antifreeze to be filled all year round; ② Water or distilled water: temporary substitute; ③ Water tank cover leaks.
The thermostat is damaged. ① If you want to remove the thermostat, you should block the small circulation at this time to ensure that all the coolant is dissipated by the water tank; ② When installing a new thermostat, you should pay attention to the water holes. For example, Santana does not have water holes. At this time, use a 6mm drill bit to drill a hole. One function is for marking; the other function is that when the car is heating up, a temperature difference occurs on both sides of the thermostat, so that the thermostat opens accurately with the water temperature.
The water tank is clogged. ① If the external blockage is blocked, use water or air to remove the dirt; ② The internal blockage will affect the circulation of the coolant and generate pressure. At this time, there will be two results, one is water tank leakage, and the other is when driving at high speed. The water temperature is extremely high.
Water pump failure. ① The impeller slips or gets stuck, causing the timing belt to break; ② The impeller is deformed.
Cylinder damage. ① The combustion chamber flushes with the water channel. At this time, water will be drained from the drain pipe or white smoke will be discharged, causing the water tank to be frequently short of water. 2. The water channel flushes with the oil channel (the engine oil is white when water is present). 3. The water channel flushes with the water channel, causing the cylinder to dissipate heat. Bad, especially at high speeds, the impact is greater; ④ Water channels are blocked.
Extended information:
Solutions to excessively high car water tank temperatures:
1. Pull over, put the automatic transmission in P gear, and the manual transmission in neutral. , pull the parking brake handle and turn off the air conditioner.
2. If you find coolant boiling and overflowing from the radiator after opening the engine cover, please turn the engine off immediately and turn the car key to the on position. Do not start the engine again. This will allow the radiator to The electric fan can run automatically to facilitate heat dissipation.
3. Cold coolant level. If the coolant level is low or there is no coolant at all, check whether there is leakage at the upper port or whether the fan drive belt is broken.