The Official FC Radiator Thread.

[vex]

Originally Posted by WE3RX7

Distilled water has a low pH. Water by nature tries to seek a balanced pH and when distilled water is put next to aluminum, it'll leach the minerals it wants from the alloy. This causes build up and soot in the radiator tubes.

If you use an "aluminum safe" antifreeze, you'll be ok as it has silicates in it on purpose to act as sacrificial mineral deposits.

That makes sense, however the additive of the royal purple is alkiline(sp) based, I can't remember if alkilines will increase or decrease the PH balance. Anyone remember?