Centaurus. Yes it was the second one. I was told the engine went out because of detonation caused by the crew selecting the carb heat to full. I don't know why the first engine failed but was led to believe it also failed due to improper use of carb heat.
I was flying over the bush in WA one summer in a Dakota with an OAT of 45C and both engines were detonating. Every 30 minutes one or the other would cough and recover. Too high a temp is probably just as bad as too cold.