[brucep]

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)

 

[1 Lucky Texan]

are you using the arrow, triangle on the front of the crank sprocket for timing?

that's TDC cyl#1 - you want mid-travel on all pistons - the belt install mark is a dash/groove on a metal tab at the rear of the crank sprocket.