Engine coolant should normally maintain a temperature around 90℃. Both excessively high and low temperatures can cause damage to the vehicle. Lower temperatures indicate stronger cooling performance, but it's important to understand that coolant is not better the colder it is. Excessively low temperatures mean greater heat loss from combustion through heat dissipation, and lower operating temperatures result in higher fluid viscosity. Increased viscosity leads to greater resistance in moving parts and reduced power output. Below is an introduction to coolant: 1. The primary function of engine coolant is to protect the engine and ensure its proper operation. It circulates within the engine radiator, providing anti-freeze, anti-boil, anti-rust, and anti-corrosion effects. Most coolants are colored red or green to facilitate leak detection and to distinguish them from other engine fluids, preventing confusion. 2. Engine coolant should be replaced based on mileage or time intervals, as it's difficult to visually determine its degradation level. If the coolant appears unchanged but its anti-rust properties have diminished, components like the radiator, pipes, and hoses may be damaged. 3. Measure the antifreeze's freezing point; when replacing antifreeze, prevent leaks and avoid injury from hot coolant spray. Ensure complete drainage of the old coolant (from both the radiator and engine block); refill to the standard level; avoid leaving any residue on vehicle components; and confirm there are no leaks after the procedure.
