cooling system pressure

[pasophist]

I think I have successfully plastic welded my split coolant overflow tank.
I can't blow any air through leaks under water.

Does anyone know what the pressure in the cooling system is that the tank should be able to withstand?

Thanks,

SMS

[persempre907]

I wouldn't tell any crap, but the 907's cooling system wouldn't be under pressure.
So, it's enough that it doesn't have any leak.
Ciao

[ducapaso]

the working pressure is marked on the water cap.
That should be 1.1 or 0.9 (this means 110% or 90% over the normal atmospherical pressure)