newley installed engine won,t spin over

[grumpyvette]

Hey there, I've been reading for a while but first time poster.

here is my problem.
I just finished rebuilding a 350.
I had a machinist bore/hone/align hone the block and set up all the bearing clearances.

when finished assembling the motor, i set the valve lash and it turned over fine.
When i dropped the motor in the truck and tried to start it, it turned over a few times sluggishly,and it sounded pretty harsh.

now it won't crank at all.
the starter engages it just doesn't spin.

i took the plugs out and it still wont spin.
i took the starter off and the starter spins by itself.

now i cant even get the motor to turn by hand
i did crank it by hand when i was assembling it and it turned fine,
i did use assembly lube

and i did prime the oiling system, but not for five to ten minutes, probably only for a minute or so.

if its locked up due to lack of oil, if i prime it again for the correct time do you think it will free up?

any help or ideas anyone can offer would be appreciated.
Thanks

from the limited info posted, and if the engines placed in neutral and your sure the drive trains not binding it, and the accessories and fan belts are not binding it Id suggest trying to turn the crank with a breaker bar and if it won't turn,with the spark plugs removed and a bit of marvel mystery oil squirted into each cylinder, Id strongly suspect the valves were not correctly adjusted , or he's got a clearance issue in the valve train, and/or he's bent one or more valves and the bent valves are preventing engine rotation,'or the valves are adjusted way to tightly, Id suggest removing all the rocker arms as a first test to see if it frees up rotation of the engine' ,if it does do a compression test, to see if you have bent valves, if the engine won
obviously if the engine locks up at some point in the rotation, while you test to find out why the engine won't easily rotate a full 360 degrees,
but allows you too reverse directions and spin it almost the full 360 degrees before it again locks, preventing full rotation your engines got some part physically binding, preventing your rotation, , its most likely sone failed part like a broken piston, or valve train component, forcing it will result in DAMAGE, thus you must pull the head(S) and maybe the oil pan for a closer inspection, before you proceed and potentially cause more damage
t turn,once the rockers are removed its time to pull the heads to inspect carefully, if it won't turn with the heads off , pull and disassemble the short block until you locate the cause and correct the problem, theres a dozen potential reasons the engines binding up youll need to isolate and test, each one, it could be connecting rods binding, rings with the wrong end gaps or a dozen potential reasons but random guess work won't help, honestly the whole test and isolate process is not that difficult so approach it logically and don't be reluctant to tear it down as far as required to locate and correct the problem, rather than making wild guesses
obviously if the engine locks up at some point in the rotation, while you test to find out why the engine won't easily rotate a full 360 degrees,
but allows you too reverse directions and spin it almost the full 360 degrees before it again locks, preventing full rotation your engines got some part physically binding, preventing your rotation, , its most likely sone failed part like a broken piston, or valve train component, forcing it will result in DAMAGE, thus you must pull the head(S) and maybe the oil pan for a closer inspection, before you proceed and potentially cause more damage