Detroit 2-stroke diesel injector timing...a close up of what we're checking...and how.

I love seeing the videos of racks being run and injectors being timed, in the engine. But sometimes that makes it hard to see the detail. So, since I needed to recalibrate my Snap On injector timing gauge it was a good opportunity to show exactly what's being measured and adjusted. At the end, I show the pages from the M3558 Diesel Injector Gauge instruction booklet for those who don't have them.