Timing Marks 360

You might try a mirror placed in the right location to angle the timing light's illumination and your vision into the area. Or mount a reference mark on a mteal tab under a timing cover or water pump bolt, over on the other side where it can bee seen, and put new marks on the damper ring. (You can verify the marks' accuracy at the same time.) A timing tape on the damper ring would be useful if you do that.