What are the precautions for adding coolant?
2 Answers
Here are the precautions for adding coolant: 1. Do not mix different types of antifreeze: Mixing antifreeze can easily cause chemical reactions, producing sediment or bubbles, which reduces its effectiveness. Additionally, leftover antifreeze should be labeled with its name on the container to avoid confusion later. 2. Avoid running the engine without sufficient coolant: During high-temperature weather, the coolant in the radiator evaporates more quickly. Always check the coolant level and monitor the coolant temperature gauge. If the radiator is not completely filled, the internal circulation of the coolant may be compromised, leading to an increase in water temperature and causing the engine to "overheat."
With decades of car repair experience, I can say that safety comes first when adding coolant. Never do it when the engine is hot—the cooling system is under high pressure, and opening the cap could cause scalding-hot coolant to spray out, burning your hands and face. Wait until the car has completely cooled down, at least a few hours, and touch the hood to ensure it's no longer hot. Use the correct type of coolant; different vehicles require different types, and never mix green and red coolants, as this can cause sediment buildup, clogging pipes and damaging the cooling system. Before adding coolant, check the fluid level when the engine is cold—it should be between the min and max marks. Too much can lead to leaks, while too little risks engine overheating. Here's a pro tip: after topping up, avoid long drives immediately—let the system circulate first and listen for unusual noises or leaks. Regular coolant replacement is also crucial, as degraded fluid can corrode pipes. I've seen many owners neglect this, leading to costly repairs. Always check the manual or consult a professional before adding coolant to avoid safety risks.
