Ok- this took a longer time to post than it took to actually do, sorry for any delay. All it really took was a couple of bolts to get the connecting rod cap off and I could see the damage to the crank. I have no experience assessing damage like this, but I can definitely tell that the crank journal (and maybe to a lesser extent the rod?) is scratched and not like the others.
The bearing cap and crankshaft journal, "establishing shot".
Close up of the inside of the bearing cap. There was no bearing left in this one at all.
Shot number one of the crank journal for the rod- you can see and feel the scuffing.
Shot number two- hard to really do it justice with a photo- the difference in texture is really impressive.
I thought it worth including a shot of the connecting rods themselves, as there is a question of whether these are the "third gen" rods which were upgraded after these engines had been in production for a while. The previous owner's notes say the engine had been rebuilt, and there is an oil reservoir in the engine compartment that I hear is associated with that upgrade, but this shot should help figure it out. It's stamped Isuzu-FM-3234.
And finally, here is where we are now. Nothing left to remove! Now the block is light enough that I can haul it around by hand if need be. Next steps- take the block and crank to a machine shop for measurements, and to see what they think about this crank. The manual says that it shouldn't be ground because it is tuftrided, but I wonder if there's something we can do.
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