A 1915 Duesenberg, sixteen-valve four cylinder walking-beam racing engine is shown getting its valve clearances adjusted above, in our shop and we thought that our readers might enjoy these photos.
We worked with a pattern maker and made patterns for the block and had a new one cast and then machined it here in the shop for Joe Freeman’s racing car. It has horizontal valves facing each other in a vertical combustion chamber above the piston. The bottom of the rocker arms (walking-beams) ride directly on the camshafts. The bottom photos shows four intake valve and seat assemblies and two seat and guide castings where you can see the vanes that it breathes thru. The Old Motor photos.