[paleyjim]

Do you have anything bolted to the rear of the crank now? If so remove everything and rotate the crank, you might have a bolt that is too long and touching something on the rear of the block.

Totally agree. When symptoms appear right after doing work, look very hard at the work you just did and anything that could be related to that work.

 

[paleyjim]

Interesting perspective on honing:
Careful with that hone

 

[paleyjim]

I don’t have experience with rebuilding without honing. Every engine I’ve built has been bored. Which of course then requires honing.
I HAVE seen plenty of Isuzu piston/liner kits destroyed by a technician with a hone - thinking he had to “break the glaze” on a new, perfectly finished liner.
Isuzu liners have an extremely smooth finish. You have to hold them just right in the light to see ANY crosshatch.