magnesium vaporizes much faster and that's what causes the bubbling sound the magnesium vapour flows through the molten metal like carbon dioxide through mineral water this changes the molecular lattice structure of the steel and will make the crankcase slightly elastic [Music] the 19 tons of molten mass now flow into two huge casting ladles there would be no point in having more than two because the crankcase mold has only two intake funnels [Music] this is what the various parts of a crankcase mold look like these two