What are the effects of adding too much car antifreeze?

1 Answers
DeAlan
07/30/25 1:59am
Adding too much antifreeze will not have any significant impact. The excess antifreeze will expand due to heat during vehicle operation and overflow from the pressure relief valve, which is harmless but may leave some stains. However, it is best to use a syringe to remove the antifreeze that exceeds the maximum water level. Generally, the antifreeze reservoir will have a max (maximum water level) and min (minimum water level) marking. The antifreeze should be filled between the max and min levels. Additional information: 1. The first purpose of adding antifreeze to a car is to prevent freezing, as winter temperatures are relatively low. Without antifreeze, the car engine may freeze. The second purpose is cooling, as the car generates a large amount of heat during operation, and the antifreeze helps to cool it down. 2. The antifreeze reservoir usually has water level markings, including a maximum and minimum level. It is generally recommended to add about 4 liters, but this should be adjusted based on the actual condition of the car. It is usually recommended to fill the antifreeze to a level between the maximum and minimum water levels. If there are no water level markings, fill it to the middle line of the reservoir or slightly above. Adding too much may cause overflow, and since antifreeze has some corrosive properties, it may cause some corrosion to rubber components in the vehicle.
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