What was found
NUMBER 5 EXHAUST LIFTER BORE ALUMINUM SLEEVE IN THE CRANKCASE WAS FOUND TO BE LOOSE & MISSING MATERIAL. THIS CRANKCASE HAD THE LIFTER BORES SLEEVED DURING CRANKCASE OVERHAUL & REPAIR. THE LOOSE LIFTER BORE SLEEVE MOVED OUT OF ITS BORE & CAME IN CONTACT WITH THE CAMSHAFT LOBE, RESULTING IN A LOSS OF 1/3 OF THE SLEEVE MATERIAL. THIS ALUMINUM SLEEVE MATERIAL, FRAGMENTS TOO LARGE TO PASS THROUGH THE OIL SUMP PICK UP TUBE, RESTRICTED THE OIL PICK UP & CAUSED AN ENG LUBRICATION DISTRESS EVENT.