I have decided to check and adjust my rocker arm clearances, since I have this loud rocker ticking. (no, it is not an exhaust leak at the gaskets...that was checked) I grab my trusty shop manual and open to section C:05:02 and :03, figures 26 and 27 where Method One is laid out clearly. I interpreted the instructions in the chart as: position cylinder 1 so that Intake and exhaust rocker arms are "on the rock" or on the peaks, then Intake cyl.3 and Exhaust cyl. 2 are in position for adjustment. (and so on, for each cylinder)... Maybe I'm reading the chart wrong, or too literally, but NO cylinder can have both intake and exhaust rockers on the peaks at the same time for the same cylinder (at least not in a 4-stroke). How is the left-most column of the charts interpreted? Are they actually stating that EITHER intake 1 or Exhaust 1 be on the peak - for I3 and E2 to be in position for adjustment? And so on for each cylinder? Eric Dunedin, FL ericp@xxxx