So i have been working on my sister in laws fathers 01 OB 5MT. It threw the timing belt. i got it all timed and he went to start it and it wont run unless you keep it at WOT. thought maybe i was 180 out of time so i took it apart and double checked that 1 was at TDC. then as i triied to line up the marks on the drivers head the cam sprocket simply locks up and wont budge. it will turn but i cant get it anywhere near lined up. he did the tear down and everything and then slit his hand open and had to get 11 stitches so no i get to put it back together but i hit this snag. Is it possible there are bent valves? he didnt take the motor out to do the belt like i told him so i havent torn it down. HELP WOULD BE GREATLY APPRECIATED.