You blew a cooler hose in a system with 120 psi? You, my friend,:rock::rock::rock: had other issues. :rock::rock::rock:
you are correct:rock:
it was the oil pump by-pass valve.
the old one had been "shuttlin" so hard that it caused extreme wear & beat in on the connections.
the hose looked like it split from the P.O.S. crimps & the low quality heater hose the factory uses.
where ya figure 120 p.s.i.???? the most i have seen with the updated by-pass valve is 95ish, cold @ idle & maybe bump 100 slowly goin through the gears cold. just askin