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1 ptsD,D1Official number: 6924

Can you add water to the cooling system of a bus engine?

Can you add water to the cooling system of a bus engine?
Explanation

Correct answer: Yes, but only in emergency situations and when ambient temperature is above zero.

The engine cooling system should be filled with a specialised fluid, which has a significantly lower freezing point than water. Adding water is permissible only in emergency situations as, in sub-zero temperatures, it could freeze and rupture the system's components, leading to serious engine damage.