I have a 2015 cat 242d with 3200 hours on it. It runs awesome most of the time but then all of a sudden it will start smoking excessively. Once when it was idling the engine rpms revved and it started smoking.....tonight when I was using b it for snow it was running fine, no smoke at all, then 20 min into it it started smoking excessively. No alarms or anything on the display. This is my first D series machine and I was wondering if it did a regen but I don't believe it does because it doesn't use DEF fluid. Any ideas whet could be causing this intermittent heavy smoke? Thanks