What was found
(CAN) ON VISUAL INSPECTION OF VALVE TRAIN ASSY ON ALL FOUR CYLINDERS. NOTED EXCESSIVE WEAR TO ROCKER ARM BOSSES, ROCKER ARM BUSHINGS & ROCKER SHAFTS. SHAFTS ARE ANCHORED BY SET SCREWS. FIRST INDICATION IS THAT THE LINE UP MARKS ON THE ENDS OF THE PINS DO NOT MATCH THE DIRECTION OF THE SET SCREW. SET SCREWS FOUND LOOSE.AT THIS POINT WE DISSMANTLED THE ASSY & THEN NOTED THE WEAR ON ALL OF THE OTHER PARTS.THIS IS THE THIRD OCCASION THAT THIS HAS BEEN FOUND ON OUR FLEET. TELEDYNE CONTINENTAL IS STILL INVESTIGATING CAUSE OF PROBLEM.