I can remember a Filipino Third ( with a Second's Ticket) who set the tappets on a generator, he tried to do it with the crankshaft in one place. Fortunately I barred it over before trying to start it, heard the rocker arm shear off, and stopped. Opened the covers and half the adjusters were screwed fully down and half of them fully up! I sailed with him for 6 months after that, never did find anything down the Engine Room that he was capable of doing right.
Going back to the original thread, I think the engine was driving a pump at a construction site and only inspected intermittently, a case of it was running at one inspection, dead the next time, certainly no mention of maintenance being done between the time it was running and when it was dead.
It is always better to ask a stupid question than to do a stupid thing.