3 weeks ago installed SE204 and Fueling Oil Pump (streached stock spring as per instructions.) Fired up with plenty of oil pressure, and went for a long ride, no problems, every thing fine. Next weekend started bike and no oil pressure. Took bike to Harley mechanic who disassembled and checked every thing including cleaning and checking oil pan (A motor). Put it back together and had plenty of oil pressure again. Took it home and ran it that day and the next with no problem. 3 days later no oil pressure again. Took oil hose off leading into cam chest and turned engine over. Lots of air being pumped out of cam chest (no oil). Went around to front and took oil filter off and turned engine over..oil comes out of filter base. Put filter back on, started bike and had pressure again..went for long ride to get new filter, again no problems. At this point, don't know if oil pressure stays up. The mechanic thinks the engine is loosing the prime , possibly due to hair line crack in cam plate. Anybody have similar problem or any ideas. Much thanks for any help.