Replacement cooling pipes

[His Dudeness]

[quote author=His Dudeness link=topic=24058.msg278918#msg278918 date=1524306768]
You can use water it won't boil because the cooling system is pressurised so the boiling point is raised but water corrodes metal and freezes at too high a temperature so you shouldn't use it on a road bike

So his issue stems from an incorrect/weak mix over time then?
Can't say i've ever used water on its own because it makes zero sense when coolant/antifreeze does what it says on the bottle.
[/quote]

Probably more likely it was from old coolant rather than too much water but the effect is the same corrosion!