Is It Normal for the Car Antifreeze Reservoir to Always Have Pressure?
2 Answers
Not quite normal. The replacement cycle for car antifreeze is every two years or 40,000 kilometers. Below is relevant information: 1. Function of Antifreeze: Antifreeze, also known as coolant, primarily ensures that the engine maintains a normal operating temperature range during operation. It also serves functions such as antifreeze, anti-boil, and anti-corrosion. 2. Antifreeze: Antifreeze is a type of coolant containing special additives, mainly used in liquid-cooled engine cooling systems. It features excellent properties like antifreeze in winter, anti-boil in summer, and anti-scale and anti-corrosion throughout the year.
I've driven several cars and have some knowledge about the coolant reservoir. Under normal conditions, when the engine is running, the coolant expands due to heat, and it's normal for the reservoir to have pressure. However, after the car is turned off and cools down, the pressure should gradually decrease, and the reservoir should become soft. If the reservoir remains pressurized when the car is cold, there's definitely a problem. It could be a faulty radiator cap that isn't releasing pressure, or a leak in the cooling system blocking the vent. Long-term high pressure can easily cause the reservoir to burst, and spraying coolant not only messes up the environment but also affects engine cooling, leading to overheating and engine damage. I've encountered a similar issue myself—checking the fluid level was normal, and replacing the cap solved the problem. I recommend regularly feeling the reservoir to test its condition when cold and hot. If you notice anything abnormal, don't delay—take it to a professional repair shop to check the system's integrity to avoid turning a small issue into a costly major repair.
