What is the engine coolant level mark?
2 Answers
There are min (minimum mark) and max (maximum mark) on the reservoir. Any level between these two marks is normal. Introduction to engine coolant: Coolant, also known as antifreeze, radiator fluid, etc. Its main function is to protect the engine for normal and optimal operation. It circulates in the engine radiator to provide anti-freeze, anti-boil, anti-rust, and anti-corrosion effects. Most antifreeze is colored red or green to facilitate leak detection and to distinguish it from other engine fluids, preventing confusion. Coolant replacement precautions: Measure the antifreeze freezing point; prevent leaks when replacing antifreeze; prevent hot antifreeze from spraying and causing injury. Ensure complete drainage of the original antifreeze (both from the radiator and engine block); ensure the correct amount is added; do not leave any leaked residue on vehicle components; confirm there are no leaks after completing the procedure.
The coolant level indicator is usually marked on the translucent plastic reservoir in the engine compartment, with 'MIN' and 'MAX' lines. My understanding is that during inspection, you should ensure the coolant level falls between these two marks when the engine is cold for safety. A level too high may cause pressure release and leakage, while too low can allow air to mix in, leading to overheating. Having driven for over a decade, I make it a habit to check the level every time before refueling, especially before long trips, remembering to wipe the reservoir clean with a cloth for a clear view. If the level is low, avoid topping up with plain water—use dedicated coolant to prevent pipe corrosion. Regular maintenance saves repair costs and extends engine life.
