How to Check if the Car Antifreeze is Low?
3 Answers
Methods to determine if the antifreeze is low include observing the antifreeze warning light on the dashboard; checking the antifreeze reservoir; and inspecting the water level scale markings on the antifreeze overflow tank. Observe the antifreeze warning light on the dashboard. If it lights up, it is likely due to low antifreeze, though it could also be caused by excessively high engine temperature. Check the antifreeze reservoir. If the fluid level is below the minimum mark (MIN), do not continue driving and promptly add antifreeze. Inspect the water level scale markings on the antifreeze overflow tank. The normal antifreeze level should be between the maximum and minimum marks. Whether the antifreeze is low depends on these marks. If the antifreeze is below the minimum mark, it indicates a deficiency. Antifreeze replacement cycle: For vehicles that operate for long periods, such as taxis, high-quality antifreeze should generally be replaced annually. For vehicles with shorter operating times, replacement can be done every two years or every 30,000 kilometers. To prevent excessive foaming, which reduces the heat exchange efficiency between the antifreeze and engine components, ensure the product is within its validity period when adding it. Long-life antifreeze can remain effective for up to three years. If suspended particles, sediment, or signs of deterioration or discoloration are found in the antifreeze, replace it immediately and clean the system.
As an ordinary dad who shuttles my kids daily, I constantly remind myself to check the car's coolant to ensure family safety. After driving, wait at least half an hour for the engine to cool completely since hot liquid expands, making readings inaccurate. Pop the hood to locate the coolant reservoir—usually a translucent plastic tank near the front of the engine bay with clear MIN and MAX level marks. The fluid should sit between these markers; below MIN indicates a shortage. Top up immediately with proper coolant (never water, which dilutes effectiveness and risks costly engine overheating). I make this a weekend routine, teaching basic maintenance to my kids—building habits that prevent roadside emergencies.
As a seasoned driver with over a decade of experience, I've summarized a hassle-free method. After parking and letting the car cool down (preferably overnight), check the plastic tank labeled COOLANT under the hood in the morning. If the fluid level is below the MIN mark, it indicates a shortage. Don't take it lightly—low coolant can cause the temperature gauge to spike or even lead to engine failure, with repairs costing thousands. When topping up, always use coolant of the same color (red or blue) as the original, as mixing brands can cause deterioration. Also, check if the liquid is clear; cloudiness signals impurities, meaning it's time for a replacement. A monthly check takes less than three minutes—simple yet reassuring.
