[1] It made engines for Premier, Chalmers, Cletrac crawlers and Owen Magnetic cars.
The exhaust side valves were in a pocket, leaving a lot of room in the cylinder head for the inlets.
In 1915, Chalmers made a great step forward with the incorporation of a full-overhead-camshaft Weidley engine, which pioneered the idea of driving the overhead-camshaft from the middle of the crankshaft instead of from the front or the rear.
The model 6-40 had a bore and stroke of 3.125 and 5 inches, respectively, and camshaft rigidity was obtained by using a 2.25-inch diameter.
[4] Weidely produced a three main bearing pushrod ohv six that powered the Auburn 6-63 models of 1923 and 1924.