I think the same as emerald, first look for simple things, radiator, water pump, thermostat ...
Then there will be time to suspect the worst, for example, if the very black expansion glass is observed and the water has bright traces of oil or black
bubble Bad, it will be enough to loosen the cold vessel cap, and start the engine by tightening it immediately, if accelerating the engine thoroughly upload air bubbles to the expansion vessel is a symptom that compression gases fuck到冷却电路。
但是,首先是基础知识,最便宜,最可能的。
一切顺利