The topic for part five is the process of running in the engine. We installed the crankshaft into the crankcase and the main bearing caps were attached. After the cylinders were fully restored and the piston and connecting rod assemblies installed, we then bolted both cylinder assemblies onto the crankcase. Next we fastened the connecting rods and their caps onto the crankshaft. We coated all moving parts with assembly lube.
Crankcase with crankshaft installed
We fabricated a "running in" mechanism using a three horse power 220 volt electric motor with a double belt pulley system attached to the flywheel. Our intention was to run in the new timing chains and sprockets, the new pistons, pins, rings and babbitt bearings. The running in would reduce friction and enhance oil flow. Also, the long term running in process would reduce strain on the starter for initial starting. The next two pictures will give you an idea of how we did it.
Here is a link to our YouTube video of the running in of the engine: