My mechanic in Dallas told me to stop topping off my coolant with tap water, and my radiator was toast 6 months later

Simon Chen · 2026-09-17T13:15:04.125489+00:00

I thought a little water here and there was no big deal since the jug was right there in the garage, but he explained how the minerals build up and eat the system from the inside. Anyone else learn this the hard way or am I the only one who missed it?

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My mechanic in Dallas told me to stop topping off my coolant with tap water, and my radiator was toast 6 months later | Car Care Tips - The Design Community Hub