Quote:
Originally Posted by Chris Cussen
If you have a hole in the expansion tank cap the system will be un-pressurised, and boil at 100 deg c.
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Chris,
The cooling system would be pressurised by the cap on the radiator.(No hole drilled in that). Only when the pressure reached 1.5 bar would the radiator cap release and allow fluid to flow into the expansion tank. The boiling point in the cooling system would then be 112degrees(ish) depending on the concentration of anti freeze.
Nigel