What Are the Reasons for the Reduction of Antifreeze in Sedans?
2 Answers
Vehicle antifreeze reduction is caused by antifreeze leakage. The reasons for antifreeze leakage include radiator damage, poor sealing of the upper and lower water chambers leading to antifreeze leakage, and loose or poorly sealed connections at the overflow tank, water pump joint surfaces, and various pipelines of the cooling system. Methods to determine if antifreeze is low: Observe the antifreeze warning light on the dashboard. If it lights up, it is likely due to low antifreeze levels, although it could also be caused by excessively high cylinder temperatures. Check the antifreeze reservoir. If the fluid level is below the minimum mark (MIN), do not continue driving and add antifreeze promptly. Inspect the water level markings on the antifreeze tank. The normal antifreeze level should be between the maximum and minimum marks. To determine if antifreeze is low, check the markings. If the antifreeze level is below the minimum mark, it indicates a shortage of antifreeze.
This is a common issue I encounter during car repairs. The most frequent reason for coolant loss is leakage. Check for signs of seepage at hose connections, the radiator, and the water pump seal, especially during cold starts when it's easier to spot. Another possibility is a blown head gasket, where coolant leaks into the engine and burns off, causing white smoke from the exhaust and emulsified oil on the oil cap. For turbocharged cars, pay attention to the intercooler pipe connections. If the pipe connections are fine, feel the temperature of the heater core hoses—if one is significantly cooler, the radiator might be internally clogged. In reality, a small amount of evaporation can occur in hot weather, but losing half a bottle in two months is definitely abnormal. I recommend placing a piece of cardboard under the car after parking and checking for leaks the next day.
