What is the structure of automotive antifreeze?
1 Answers
Antifreeze is generally composed of a base fluid and additives. The base fluid consists of water and ethylene glycol or diethylene glycol. Additives include rust inhibitors, mildew inhibitors, buffers, antifoaming agents, and colorants. Methods for selecting antifreeze: The basic indicators of antifreeze are the freezing point and boiling point. The market offers antifreeze with freezing points of -15°C, -25°C, -30°C, -40°C, etc. It is generally advisable to choose one with a freezing point at least 10°C lower than the lowest temperature in your region. Methods for replacing antifreeze: Before completely replacing the antifreeze, conduct a thorough inspection to check for any signs of leakage or cracks in the pipes, with particular attention to the five-way water pipe. The five-way pipe is named for its five connecting interfaces to various parts. Antifreeze flows through the five-way pipe and is distributed to different parts of the car to function. If there is any leakage of antifreeze in this part, replace the water pipe or resecure the interface as needed. Drain the old antifreeze, then flush the fluid channels with clean water. Add clean water to the antifreeze reservoir, then continuously inject water into the reservoir so that it flows through the engine cooling system. Start the engine and let it idle for 3 to 5 minutes to circulate the water. Initially, the water flowing out of the reservoir may have a faint pink color. Continue adding clean water until the outflowing water is clear. Note: Do not forget to remove the heater hose and drain the water from the heater core.
