I recently attempted to replace timing chain and tensioners on a 2005 Altima 3.5.
After I installed everything I attempted to roll motor over by hand just to verify everything was ok before i put outer timing cover on but it hit a hard spot around 3/4 of a full revolution and seized.i could go back the other way stops at same spot . I ended up taking everything back off along with removing cams and plugs . It is still locking up. It was running fine before I tore it down just noisy from wore out secondary's.
Any idea what could of happened?
Any help will be greatly appreciated!!!