Chuck Zucco

Bought a 2000 XK8. Broken timing chain. Knew valves were bent. Replaced them all. Reassembled motor. Ready to install the cams and took my new tool from my kit and pulled the crankshaft positioning sensor. Put the tool in and turned the crankshaft to line it up. The tool never caught. It bottomed out in the hole. It does not appear to be long enough to fit in a hole in the flywheel. is there a piece that fell 0ff the flywheel. ? Or is my tool too short?