Well if I weren't so dang busy with trying to make some sort of sense out of 40 years worth of collecting that I've got piled up from the move this summer, and if I had three hands, 2 to adjust the valves and one to hold the camera and if I knew how to take a video and knew how to post it.....takes a breath....I'd post one for you to see Gus. But here’s an old Jam Handy film strip of a guy tuning up the valves on a running Stovebolt engine at the factory in the 30’s. Skip down to 3:25 minutes on the video to see that part.
Also around that part of the film it shows a guy with a prop who is listening to the engine for noises. Pop taught me that was the best way to adjust valves more than half a century back and that’s the way I do it now. Here’s a fuzzy picture of the New Britain valve-adjusting tool that I’ve been trying out lately. Never had one of those back in the day, a stubby screwdriver and box wrench always worked for me. http://www.pbase.com/dennygraham/image/136174534