What is the reason for the high water temperature in Range Rover?
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, so as 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 there is water); 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 Waterways are blocked.
When we encounter a high water temperature alarm, we should first slow down, then drive the car to the side of the road, and do not rush to shut down the engine, because too high a water temperature will cause the piston, steel wall, cylinder, crankshaft, etc. If the temperature is too high, the engine oil will become thinner and lose its lubrication effect. If the engine is turned off at this time, the machine parts will be in a state of expansion and the gaps between the accessories will be very small. After the machine is stopped, some soft metal will fall off, and some may even cause the cylinder to stick. Therefore, after you find that the pot is boiling, do not turn off the heat immediately, but keep it running at idle speed temporarily and try to cool down.
Do not pour cold water on the engine when cooling down. This may cause the engine block to burst due to sudden cooling. The correct way is: put on gloves, put a piece of folded wet cloth on the water tank cover, gently unscrew the water tank cover a small gap, wait for the water vapor to slowly discharge, and after the water tank pressure drops, add cold water or antifreeze.
It is caused by water pipe leakage and insufficient cooling water. If this happens, you can add distilled water or purified water for emergency use, and then perform repairs when convenient. Just be careful not to open the water tank cover when the car is hot to avoid being burned by the water vapor sprayed out under strong pressure from inside. If there is enough water, check the fan behind the water tank. When the water temperature is high, the fan should be running even after the flame is turned off. If the fan does not move, first turn the fan blades to see if the fan motor is stuck. If it is normal, it can be turned easily. If there is no problem with the motor, check the fan fuse. This is one of the causes of frequent fan failures, especially in summer when power consumption is high. Thermostat failure is also a common cause of high water temperatures. Once it fails, the cooling water circulation will be cut off. When there is a significant temperature difference between the two thick glue pipes above and below the water tank by hand, the thermostat is damaged and needs to be removed and replaced. This is generally left to professionals.
If the water temperature is a little high during normal driving, you should pay attention to whether there is too much mud, lint or gravel on the surface of the water tank, which will cause the heat dissipation capacity of the water tank to decrease. It is best to clean it when washing the car. For older models, high water temperature may be caused by scale accumulation inside the water tank and engine, so you need to go to a professional shop to clean it.