My V2 engine fidget toy for a school project. To connect the crank to the engine block, slide the crankholder through the crankarm, and insert. Might take a few tries.
Cura:
-5% support infill ( any higher and supports can damage the crank)
-20% print infill (cubic)
-220C printing temp, 75C bed temp
-Shell thickness.8mm
-Layer height .2mm
-print speed 50mm/s
-wall speed 25mm/s
-travel speed 150mm/s
-retraction on
these settings work for me, but each printer is different :)