Quote:
Originally Posted by JFP in PA
Not really. Tap water contains dissolved salts which degrade the performance of the coolant with heat cycles, leading to problems like corrosion and diminished freeze protection.
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Ok point taken; I also use Distilled water, or at least when I have it available. Our water here is very good and I often forget that other area's aren't as lucky and have a lot more crap in their water. I don't think having good quality tap water in the cooling system will hurt anything, especially if you change out the coolant on a regular basis.
Many folks refuse to change their coolant every 2-3 years like it should be done, and if it was done on a regular bases it probably wouldn't have as much of an impact having a few liters of tap water in the system; but leaving the coolant in the system for 4-5-6 or more years is probably more risky as the minerals will begin to crystalize over time and the PH level drops making the antifreeze more acidic.
In my opinion not worth flushing out the whole system because of tap water added to the system (especially if it was good clean water) - just change it in a year or two again.... but that's just me.
H