I am perplexed about my freshly re-built (only 100 hours ago) 350hp 454. I baby these things after spending $$$$ on rebuilding my starboard engine. Oil pressure was always 40 to 60 PSI, water temp was 165-170 on a closed cooling system. And it was never run low on oil. I check my engines every time before and after I run them. I would love to hear any theories on WTF happened.