White Smoke when aircondition is high

[Ethan0410]

is the coolant level dropping?

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Its an old car, 96 honda vti. My mechanic told me that its ok not to use coolant, instead use distilled water. The water level never drops. Sometimes I add water on the reserve but no significant drop. Oil is also ok. Issue is intermittent, but I notice that it usually happens if I drive on high rpm or I have passengers at the back.

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