and acids do the damage. Acid will kill the bearings and corrosion
will kill the crank journals.
So you drained 9 liters of water from the oil
sump, or was that 9 liters total, oil
and water? How did it get in there, through the breather? Which would mean I guess, the engine was under water? I suppose 2 bad seals in the raw water pump
could do that after a while or maybe a really bad rear main seal. 9 liters of water with 6 quarts of oil on top is probably right up to the crank. 9 total would be below the crank, me thinks. If it were 9 liters + 6 quarts of oil, you are probably right, the crank at least, is toast without a re-grind. All the other important stuff might be OK, or perhaps repairable.
Where in Panama
are you? If you are in one of the popular areas like Colon or Panama City, you have more choices. Panama might be 3rd world but you can get your engine fixed down there.
That said I would have reservations about buying
a already"rebuilt" engine from just anybody up here or down there. If you were in control of the operation you might have better luck.
Perkins still sells gaskets, bearings, cylinders etc. etc. but yeah, no support other than parts.