When I was a Junior Engineer, back in the 70's, I joined a ship called the Strathleven, (ex Middlesex, ex Jellunga) that had been built in 1953 with twin RSG Sulzers. Before I joined, the Third on watch had heard a knocking noise from one cylinder and gone to get a screwdriver to use as a stethoscope, on his way back to the engine, the crosshead, the piston rod and conn rod came out of the side of the engine. That gave him a nasty shock, he stopped the engine quicker than he ever had before!
It turned out that the nut on the bottom of the "J" bracket from the crosshead, where the scavenge pump piston was bolted on, had worked loose and was bottoming out on the ledge inside the crankcase door at the bottom of each stroke, which was what the Third had heard, the force became too great and ripped the crosshead out of the side of the engine.
They continued to Sri Lanka on one engine and got a shore squad in, in Colombo, to rip out the debris, and clean up. Put in a new cylinder liner to make everything water tight, blanked off the fuel, lube to that unit and continued running the engine on 9 cylinders for about a year in total, they tried to complete the repair in Singapore soon after I joined, I think Metallock had to make a repair to the entablature first, but Sulzer delivered two new crosshead guides which were both handed the same instead of being a pair, they re drilled one but couldn't get it to the tolerance for being parallel, so had to remove all the internal pipework that they had made and fitted, blank everything off again and waited 6 months for a matching pair of guides to be supplied while the ship went to Australia and back.
Eventually got the crosshead guides fitted and new Xhd, piston rod, connecting rod and piston fitted in Singapore Northbound, discharged all the cargo in the Persian Gulf and came south as far as Karachi where the ship was sold for scrap and run up the Beach.
It is always better to ask a stupid question than to do a stupid thing.