I guess I'm going to be the bad guy, and say that I don't think the engine rebuilder is at fault.
Steve installed the rocker that ziegler says is causing the oiling problem
.They then noticed that the rocker assembly is not the correct one for the 3306 caterpillar engine long block I got from Capital Exchange, I used the rocker assembly from engine that went bad on me
The engine rebuilder never saw that piece. All they can go by is arrangement #. I don't see how they could be liable for parts they never saw. We don't know if the old rocker was original to the machine, or from a rebuild with a different style head sometime in the past. A guy who works on those engines all the time would notice it, but I myself wouldn't know the difference.
Steve did the timing and installed the oil pump, and in this thread he recounts his issues with oil pressure, and not being sure he was getting oil pressure after reassembly.
He's the one that used ether on it to get it going.
He's the one driving it around, in the video he posted, with it running so poorly.
He took the dozer out and pushed dirt with it (according to his posts), and tells of injectors being loose, and seemed to be missing/ low power.
I don't think the issue then was the injector- it could be the poor oiling, and from the scoring on the cylinder walls, I doubt he was getting good compression. If he was out pushing dirt for a hour with no oil pressure, or just poor oiling, I could see his scoring, probably the valve chipped is from a piece of a ring getting trapped under it, causing it not to close all the way, letting the piston hit it.
None of that can I really lay at the rebuilder's feet. They installed sleeves and pistons and bearings, to spec in a block, but I don't see how what they rebuilt, caused steve's issues.
It stinks and I feel for you steve, but I don't think that this can really be laid at the rebuilders feet.