What was found
(CAN) DETONATION OF NR 4 CYLINDER CAUSED SEVERE MELTING AND DETERIORATION OF NR 4 PISTON RING AND AREA, PRODUCING AN OPENING INTO THE BOTTOM OF THE PISTON. METAL CONTAMINATION FROM NR 4 CYLINDER DETONATION CAUSED OIL STARVATION TO THE BEARING SURFACES OF NR 2 CONNECTING ROD AND CRANK PIN JOURNAL. THE SEVERE OVERHEATING AND METAL TRANSFER CAUSED NR 2 CONNECTING ROD AND CAP TO SEPARATE CAUSING FURTHER INTERNAL DAMAGE TO THE INNER SURFACES OF THE CRANKCASE AND THE CYLINDER BARRELS OF NR 1 AND NR 2 CYLINDERS. THIS DAMAGE HAS PREVENTED THE REMOVAL OF NR 1 NR 2 CYLINDERS FROM THEIR BORES. THE CAUSE OF THIS DETONATION DAMAGE HAS NOT BEEN DETERMINED.