So, there are two pistons between each bearing.
<br> Another issue is that the oil passages leading to the pistons are shared for the 4 inner pistons, affecting 2 connecting rod bearings:
:[[File:ClipCapIt-240407-125103.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>
===Excessive Force on the Main Bearings=== Since the engine is so short, with only 4 mounting points, the two central bearings are subjected to excessive force. Not only is it a problem that there are so few, but they are also very narrow to save space, allowing the engine to be mounted transversely.
===Oil Pump Issues===
