Thanks for the reply, Spook. It would figure that I was already at the dealer today. I never thought to ask if the pointer was available as a separate piece.

When you refer to lines - I assume that you're meaning on the actual body of the tensioner. There are 3 what I would call reference marks on the casting. The first and second are the left and right sides of a bar. The third is the point of an arrow. Hard to describe in print, but if I remember it right that's a good explanation.

The tensioner is new, so hopefully we don't have any issues with sheared internal components.

My main question is what causes the pointer to move? Is the hole through the pointer round, or does it have some keying shape to lock it to the internal shaft of the tensioner (which is what is being "twisted" as the tensioner bolt is tightened, right?).

Thanks again!