Why is the expansion lid of the car too tight but leaking?
The reason why the automobile expansion pot cover is screwed too tightly but leaks
The reason why the expansion lid of the car is screwed too tightly but leaks is because of the design principle of the expansion lid. The expansion pot cover, also known as the pressure water tank cover, is a key component of the automotive cooling system. The valve attached to it generates the necessary pressure to help keep the engine running within the appropriate temperature range. With the operation of the car, the temperature in the water tank gradually rises, causing the internal pressure to increase. When this pressure reaches a preset threshold, the pressure valve automatically opens, allowing the coolant to flow into the overflow tank. When the vehicle stops running, the cooling system will draw back the coolant in the overflow tank. If the expansion lid is screwed too tightly, the valve can not open and close normally, it will lead to the leakage of coolant, affecting the normal operation of the entire cooling system.
To solve the problem that the expansion lid of the car is too tight but leaking
Check the pot body and water pipe :
If the pot body is damaged, it is recommended to replace the new kettle in time.
If the water pipe is blocked, you can try to remove the leaking part, apply glue and reinstall it.
Make sure the coolant level is right :
Ensure that the coolant level is always between the highest and lowest scale lines to ensure the normal operation of the cooling system.
Emergency measures :
If the water bottle cracks and leaks, it is strongly recommended not to continue driving, because it is impossible to determine the amount of water remaining in the tank, after starting the engine, the antifreeze will circulate and may be discharged due to air pressure, which may cause the engine to overheat or even pull the cylinder.
Through the above method, it can effectively solve the problem that the expansion lid of the car is too tight but leaks, and ensure the normal operation of the car cooling system.
There's no coolant in the expansion pot. What happened?
The coolant in the expansion pot of a car is not available for a variety of reasons.
First, the most common cause of coolant reduction is leakage. This includes leakage of water tank covers, water tanks, water pumps, rubber hoses, air exhaust nuts, cylinder gaskets, etc. Leakage in these areas may lead to a gradual loss of coolant, especially at high temperatures, where rubber and metal parts may age due to thermal expansion and contraction, creating gaps that lead to coolant leakage. In addition, if there is leakage at the thermostat, it will also affect the maintenance of the coolant.
Secondly, the antifreeze into the cylinder to participate in combustion is also a possible reason. If the intake manifold pad and cylinder pad are damaged, coolant may enter the cylinder and drain with the combustion process of the engine, resulting in less coolant in the expansion pot. In this case, the oil may deteriorate due to the incorporation of the coolant, resulting in emulsification.
There is also a possibility of excessive natural consumption of coolant. While this is less common, in some cases, the coolant can be excessively consumed due to excessive engine temperatures or other issues.
Finally, after the new car or just replaced the antifreeze, there may be a lack of antifreeze, which is usually caused by part of the air inside the engine is not drained, rather than a real leak.
In order to solve this problem, it is recommended to first check whether the cooling system has a leak point, which can be judged by observing whether there is a water trace under the chassis or water tank. Second, check whether the thermostat and other related components are working properly. If coolant is found to enter the cylinder, it is necessary to replace the cylinder gasket and other related parts. In addition, regular inspection and maintenance of the cooling system to ensure that all components are in good condition is also an effective way to prevent coolant loss.
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