ENGINE WAS COLD, SAT OVER NIGHT, IN THE MORNING TRIED TO START VEHICLE, GLOW PLUG LIGHT TURNED OFF AND ENGINE WAS CRANKED, ENGINE CRANKED SLOW BUT DID NOT START AND WITHIN SECONDS ENGINE COMPARTMENT BURST INTO FLAMES. FIRE WAS EXTINGUISHED WITH A FIRE EXTINGUISHER. FIRE DESTROYED PASSENGER SIDE OF ENGINE COMPARTMENT, SMOKE DAMAGE IN CAB. CAUSE OF FIRE UNKNOWN AT THIS TIME. HAS NOT BEEN DETERMINED IF VEHICLE CAN BE REPAIRED. *JB