Haaaaallllppppp
Well...got the oil pan on, everything clean, did a quick visual on the bottom end, nothing looked out of the ordinary. Buttoned up my top end stuff, and had her ready to fire so I pulled the plugs and got all the soaking atf out the cylinders that I put in along time ago so the cylinders, rings, and stuff didn't rust up.
Left the plugs out, cranked it a few times till I had oil pressure and everything was looking good and cranking great...then we went to crank it again and it was locked up, I can get 3/4 revolution out of the crank with a ratchet either way but it is straight up locked beyond that.
Pulled the starter, did a visual and all the converter bolts are in. Pulled the valve covers and checked for a dropped valve, broken spring, etc with a boroscope via the plug holes and also through the intake runners. Found one little piece of debris on the #6 cylinder intake valve, non metallic from what I can tell, I pulled the valve spring off the seat about 3/4 inch and dropped it into the cylinder then found it with the boroscope, after this I released the valve spring so both were 100% closed and tried fishing the little piece of debris out, that didn't work so I brought the cylinder to tdc and stuck an airline in there...apparently it blew out because it is gone (and yes both valves were closed so it didn't go back in the into either of them). Anyways I then rechecked all valves and they all seat real nice, no bent or broken valves from what i can tell.
The engine was still locked up so I pulled all the rockers and spun the engine, which should eliminate valvetrain interference. Still locked up, double checked for seated valves and everything ok.
Drained the oil and stuck the scope through the drain hole, got a pretty decent visual on all cylinders, rods, caps, etc..nothing looked out of the ordinary. Only thing i could not see was all the pistons, but i can see all of them through the plug holes with the scope, they all seem in line and move freely until it locks up.
Next I pulled the manifold and checked for anything weird, everything looks ok, I do have a couple cylinders not moving one of their lifters but without being able to turn it a full revolution I dont know if thats abnormal or not.
My next plan is to pull the timing cover and check for a broken chain or general brokenness then drop the oil pan again if necessary and see what's up.
Any thoughts that might be helpful???

Sent from my VS988 using Tapatalk