Are you suggesting that when you attempt to turn the cam sproket, it hits some resistance INSIDE the engine so you cannot turn it any further?
It is a GOOD thing that you did not try to force it
I suspect a valve is hitting the top of a piston. Perhaps you can try to turn the crank a little to move the pistons... then re-try adjusting the cam-sproket to the proper position. (then re-set the crank to proper place.)
At all times DO NOT force anything.
(I believe a better way to do this task is to LOCK IN PLACE all the sprockets before removing the tensionor and belt..... then everything remains in the proper timing)
It is a GOOD thing that you did not try to force it
I suspect a valve is hitting the top of a piston. Perhaps you can try to turn the crank a little to move the pistons... then re-try adjusting the cam-sproket to the proper position. (then re-set the crank to proper place.)
At all times DO NOT force anything.
(I believe a better way to do this task is to LOCK IN PLACE all the sprockets before removing the tensionor and belt..... then everything remains in the proper timing)