Black Soot all over on the roof of my truck

Driver side could be just a dummy stack and not connected.

 

I'm sorry, I try and understand, I really do, but if I would have said this to my 1st boss, well, let's just say the whole fleet would be in an uproar,,, I'll admit, I was green once, but I don't recall being this green. Don't get mad, lonestar, it's why this site is here, and any question is fair game, I just never thought I'd ever hear something like this. When the trucks were lined up at night, and rain was in the forecast, a stack cover(s) was mandatory, or else, whoever blew soot all over your truck owed you a wash job, loosely enforced, but payback is a bitxx, and I knew of guys P.Oed, that would dump water down the perpetrators stacks and leave. I suppose with DEF, it's entirely possible not to have any soot, I believe what DEF is supposed to eliminate, so the question is valid, we sure have come a long ways.
Sorry for being the sites wiseaxx, get a couple old milk jugs, cut them open partially, tie a stick to the handle, and after shutting the truck off, cover the stacks, problem solved. Just don't forget to remove them, they go pretty far if not.

 

Give it time. Some moron will figure out a spinning muffler full of exhaust fluid or something equally dumb reduces emissions of some evil oarticle by 0.00001% and every truck made will have multi thousand pound multi tens of thousand dollars worth of barely reliable systems installed.

Also ive seen some ultra high end headlights that use a liquid based phosphorious and laser to make headlights with. So blinker fluid may not be far off.

 

Don't think of it as soot , think of it as hammer dust. And if it's like the 12.7 I drive it don't as much leak oil as it seeps horsepower. Lol.

 

Ha! Seeps horsepower! That's a new one to me - I like it!

 

I’d Listen Goodysnap. He’s got a lot of experience and knowledge. I imagine it’s more on passenger side, because it’s a straight shot, drivers side has to travel across and up. Always a bunch of loose carbon/rust when I’ve change my exhaust. They’re caked with carbon, and rusting inside, falling apart. As everyone mentioned, it’s probably just from water in the pipes. Same reason Truck Wash has you start it up, before the final rinse. I always rev it up good till done rinsing. Might be able to take it apart, hit it with a hammer, loosen it up, clean it out. Be ready to replace parts. Old exhaust usually doesn’t come apart easy. Muffler baffles fall apart, ending in a pile of rusty soot. I’ve turned my old mufflers upside down after removing and hear all the rust inside, dumps out a pile of crap. If it doesn’t just happen after a rain, or condensation from being parked a while, you might want to take the pipe off at or near the turbo, make sure it’s not wet with fuel or oil. It often looks like oil, and turbo is blamed, when it’s actually fuel. You can usually smell raw fuel if it’s blowing out the stacks. No need to disassemble anything to find a hole or leak. Just look for black soot.