It would be intersting to see the failure point inside the Radaitor.

IT must have been a serious breaking ogf hte cooler inside the radiator
for the proessure to build up faster then the pressure cap could
release it and cause the Hose to split.

The pressure in that cooler line can be over 100 PSI depending on the
engine speed
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 þ SLMR 2.1a þ 0