Yes !! I too have spotted this few times. WDM series are quite bulky type locos & can catch fire at any time. I still remember when i was small , once i spotted Kalka mail with the same problem at Dankuni . That time kalka used to get diesel locos. So its alco was emitting some blue , yellow type flame from it's chimney. EMD are better locos than this one.They are fuel efficient locos & have greater power than alco series.