Been watching this thread with great interest, as I'm seeing some small cracks in my belt - think I'll take it and have it done, though!! Hard to believe that something as precise as timing would be described in the manual as "line up the mark to the 2 o'clock position". Sounds like a 1950's era vehicle rather than a 1999-2001! Seems this would be further compunded by having to line up 4 marks to such subjective points in space - unless the computer compaensates and adjusts the timing??