1998 tdi beetle belt broke at 100 kms/hour. I have replaced head, pistons seemed ok. Having problems putting everything back on time. Crank is timed with marks in standard transmission Cam is timed on back with a flat bar. I locked the injector pump in place with a 15/64 drill bit but there is three different opening in the gear how do I know which one is the right opening. Or is there a different way to do injector pump???