What is the function of antifreeze in summer?

[Jeff]

Antifreeze plays roles in corrosion prevention, evaporation resistance, and cooling heat dissipation during summer. The main functions of antifreeze are as follows: 1. Cooling function: Cooling is the basic function of antifreeze. When the engine is running, it generates a large amount of heat, with about 60% of this heat being dissipated into the surrounding space through the cooling system. 2. Antifreeze function: In winter, when temperatures are low, antifreeze is added to the engine coolant to lower the freezing point of water, ensuring the cooling system does not freeze in cold weather and allowing the car to continue operating. 3. Anti-corrosion function: The engine and its cooling system are made of metals such as copper, iron, aluminum, steel, and solder. These metals can corrode and rust over time when exposed to water at high temperatures. Antifreeze not only prevents corrosion to the engine cooling system but also has anti-corrosion and rust removal capabilities.

[AryaAnn]

Summer coolant is actually super important! Although it's called antifreeze, its main job is cooling. After driving for over a decade, I've seen too many people replace coolant with plain water in summer, only to have their engines overheat. Coolant has a boiling point of over 110°C, much higher than water, so even when the engine temperature soars to over 90°C in traffic jams, it won't boil. Plus, it contains special additives that protect metal pipes from corrosion and prevent scale buildup in the radiator. Using tap water long-term can cause rust that clogs the cooling system, and when switching back to coolant in autumn, you might find the radiator already corroded through. Most importantly, coolant provides year-round protection against rust and high-temperature protection—don't try to save money by using water instead.

[VanRyder]

In summer, coolant primarily serves three functions: resisting boiling, preventing corrosion, and reducing scale buildup. I've disassembled radiators and observed that pipes long exposed to water develop rust nodules and scale deposits inside. The ethylene glycol formula in coolant has a boiling point as high as 120°C, capable of withstanding high temperatures during traffic jams. The silicate components act like protective armor for metals, preventing rust even when cast iron engine blocks and water pump impellers come into contact with the liquid. Phosphates inhibit scale formation, maintaining clear pathways in the cooling fins. During seasons with abundant willow catkins, cooling fins are particularly prone to clogging, causing unprotected radiators to overheat rapidly. It's recommended to replace coolant every 2 years or 40,000 kilometers, as expired additives render it no more effective than plain water.

[LeTimothy]

Many people think antifreeze is only useful in winter, but that's completely wrong! In summer, the engine compartment can get hot enough to fry an egg. Antifreeze has a boiling point over 20 degrees higher than plain water, which is crucial for preventing overheating. It's also a lifesaver for water pumps—the corrosion inhibitors in the liquid protect aluminum alloy pump housings from being corroded through. Last week, my neighbor's car started smoking on the road because they used water instead of antifreeze in summer, causing the cylinder head gasket to blow. The mechanic said the radiator was rusted like a honeycomb coal briquette inside, and the cleaning cost was ten times more expensive than antifreeze. Now, with temperatures hitting 40 degrees during long highway drives, it's all thanks to antifreeze keeping the cooling system functioning properly.

[SabrinaLynn]

Antifreeze acts as a cooling guardian in summer. It's common for the coolant temperature gauge needle to hit the red zone during prolonged engine operation. Antifreeze's high boiling point keeps it in liquid circulation, whereas water would've vaporized. Its more covert role is corrosion resistance: cooling systems contain five metals like iron, copper, and aluminum. The Organic Acid Technology (OAT) in antifreeze simultaneously protects all metal interfaces from leaks. During my last maintenance visit, the technician used a refractometer to test my car's old antifreeze and found its buffers depleted, prompting an immediate replacement. Aged antifreeze experiences cliff-like protection drop-offs.

[EleanorLee]

Simply put, coolant is a lifesaver in summer. Last time I was driving my old car on a mountain road with the AC on full blast and continuous uphill climbs, the engine temperature warning light suddenly flashed. Thankfully, the coolant prevented the engine from boiling over. I had to pull over and shut off the engine for ten minutes to cool it down. Plain water would have evaporated long before under such conditions. Nowadays, radiators in new cars are designed to be very compact, and if the cooling fins get blocked by just 30% with insect remains or willow catkins, overheating becomes a real risk. The anti-scaling agents in coolant help keep the passages clear. The worst case I've seen at the repair shop was someone using mineral water as coolant in summer—it corroded the water pump shaft to the point of breaking in just three months. It's advisable to check the coolant level and concentration before summer hits.