ok i will add my . 02, diesel exhuast does contain cancer causing compounds and over time and repeated exposure you will get the cancer and possiblly die. it does not matter which engine, cat, cummins, ih, mercedeze. they all produce the compounds maybe different levels due to types of emmition control systems
i work the the FD, it is documented about diesel exhaust, we have an exhaust evacuation system in our bays hooked up the pipe it pulls off when we pull out on a run.
i know fellas that are dieing right now becasue they and their bosses did not think that you could get sick or die.
i am not here to fire up everyone nor do i know where the research source was, poeple to tend to overstate at times, but taking a toke from the smoke pipe aint the best thing to do... ... ...