Is it serious if the coolant exceeds the upper limit?

[VanBradley]

It is not a big problem if the coolant slightly exceeds the upper limit, but it may leave some stains. However, if it exceeds the upper limit significantly, it may cause excessive pressure. It is best to use a syringe to remove the excess coolant above the upper limit. When adding coolant, it only needs to be filled between the min and max marking lines. Below is some relevant information about coolant: 1. Coolant is an essential liquid for maintaining the normal operation of the engine. It continuously circulates in the engine water jacket to remove excess heat. Too little or too much coolant is not ideal. 2. When there is a shortage of coolant, never use tap water as a substitute. Distilled water can be used instead. Tap water contains minerals that can form scale at high temperatures, which may clog the engine's water passages or coolant pipes. 3. Replace the coolant promptly if its freezing point is insufficient. If the outdoor temperature is too low and the freezing point is inadequate, the coolant may freeze. When frozen, the volume of the coolant will expand, potentially damaging the engine.