Timing belt: It's the three bolts used to alter the timing on the injector pump pulley. If you loosen those, with the locking pin still in, the pulley rotates just sufficient for the teeth to align. Then, when you tension it, the pulley goes back to the correct position. ( I did mine 8 weeks ago) If I get the location right, you're only an hour away from me (Jacobs Well) - PM if you want a hand.