What was found
ENGINE DEVELOPED AN OIL LEAK AT THE NR 4 CYLINDER, AROUND THE PUSH ROD TUBES. AFTER REMOVING THE VALVE COVER IT WAS APPARENT THAT THE SPRING THAT HOLDS THE PUSH ROD TUBES INTO THE CASE WAS BROKEN. WHEN THE SPRING CLIP BROKE, IT ALLOWED THE PUSH ROD TUBE TO BACK AWAY FROM THE CASE, SLIGHTLY, ENOUGH TO LEAK A GREAT AMOUNT OF OIL. AFTER FURTHER INSPECTION OF THE OTHER CYLINDERS, THEY WERE FOUND TO BE CRACKED AND BROKEN.