I apologize for asking this question as I'm sure its been answered before. However can anyone simplify the timing process of a 02/ 250f. I set the values per the manual. Ext .017/.020. Int .010, .010, .011. Then I lined up the timing marks with the head and the lower "I". The problem I'm experiencing is, that once it is all lined up and then I install the tensioner by doing so the "I" is rotated out of position. Is this normal? Or do I need to compensate for the movement? Any help would be greatly appreciated.