Rocker Shaft Mount for VW 2 Cylinder 'Half Bug' Engines

grabcad

Some people modify old VW Beetle 4 cylinders to make small, lightweight 2 cylinder engines. Obviously there are a lot of concerns with such a process. One issue faced is that the rocker shafts on each side of the 4 cylinder engine are supported at two points. With two cylinders removed the rocker shafts are supported at a single point, so that rotation is allowed. Some people drill into the cylinder head and install roll pins, which doesn't always prevent rotation.This mount is my answer to the problem. One is needed for each side of the engine. The small tabs on the bottom go around the sides of the small support surface that the rocker shaft sits on. The cylinder head should be machined to match these mounts, so that they do not rotate when installed.The DWG and PDF are the same document, just different formats. These contain drawings with specifications that are not in the STEP. I have not made any of these; we ended up going with a 4 cylinder so they were not needed.