7,540
edits
Changes
→Design Flaws
:[[File:ClipCapIt-240407-125103.PNG]]
:[[File:ClipCapIt-241107-223902.PNG]]
The oil enters the crankshaft through a hole located at the center of the main bearing. From there, it travels through angled passages to the connecting rod bearings. However, because there are only 4 mounting points and 6 pistons, the two central bearings (marked with a circle) supply oil to two places, one to the right and one to the left. This is designed so that the crankshaft journal has two holes at these points, offset by 180 degrees. As the crankshaft holes pass over the half-circle of the main bearing where the oil supply port is located, oil can be delivered to the left connecting rod bearing half the time and to the right one the other half. As a result, the oil pressure pulses for the inner 4 connecting rod bearings. It is always the two central bearings that tend to seize. <br>