How Often Should Engine Coolant Be Added?

[DiCharlotte]

Automotive antifreeze only needs to be replenished every two to three years. Methods for draining antifreeze: There are three locations where it can be fully drained: the lower part of the radiator; the lower part of the engine; and the small heater core inside the vehicle. It is important to note that after draining, the vehicle should be started for 5 seconds and then turned off (when the engine is cold). Precautions for replacing antifreeze: Generally, when replacing antifreeze, if the new antifreeze is of the same type (either ether or ethylene glycol), there is no need to worry about completely draining the old one. If switching to a different type of antifreeze, after draining the old antifreeze, you can add clean water 1-2 times, run the engine, and then add the new antifreeze. This minimizes the residual content of the old antifreeze. Even if some water remains, it won't cause any issues since all antifreeze contains water. After replacing with new antifreeze, be sure to check its specific gravity, as levels that are too high or too low are not ideal.