Full circle oiling on rod bearings

Yep. rod bearings can't use grooved bearings. They are last on the bottom end oiling list. The grooves in the mains provide a channel for the oil to go through as the crank turns so the rods get a more constant supply of oil. Half groove is the norm. There are tapered groove bearings for the main cap which gives it about 3/4 groove or you can use upper bearing shells in the caps from a second bearing set to give you a full groove. toolman