My motor is hurt. Got the truck back home finally last week and it still is pushing a bunch of oil out from the turbo drain tube. Noticed an excessive amount of blow-by and decided to run a compression test. Sure enough cyl #1, only had 390 psi, the rest were in the 460 to 520 psi range. Not sure what exactly went wrong, and won't know for sure until I open it up, but most likely it scored the cylinder, perhaps broke a ring, or something similar.
So I tore down my spare motor to make sure that the block was viable. The seller had thought it spun a bearing, so I was worried the main bearing bores may be wiped out if that indeed was the case. Luckily, it had not. However, it did hydro-lock #7, but there doesn't seem to be any block damage. In fact, the pistons and bearings look brand new, and everything is still standard dimensions. I am thinking someone did a quick rattle can rebuild on this one, tossed in new bearings and pistons, and then hydro-locked it after only a few hours of run time. It then got (angrily) yanked out and set aside until I picked it up. So off to the machine shop it will go to get cleaned up and bored out to match the set of pistons I have on the shelf. I will then re-assemble the short block and swap it out with the short block in my truck. Fun times....
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