Z-Peller wrote:
GM Duramax exaust tip megaphone is an engineered venturi to cool exhaust gasses during regen cycle. DONT monkey with it! Absolutely no need to. I ran diesel engine tugboats for 40 years and sure do know what diesel exhaust smells like, and have dealt with dirty exhaust soot everywhere. These new diesel engines with DPF are a different animal altogether. No black smoke, no soot, and not even a diesel smell from the exhaust unless people screw around chipping them.
Interesting.... buddy is a Diesel tech for Ford, and he was saying something down the same lines..... he said the computer ( lack of better word) in the truck is designed to have that megaphone run uninterrupted....
Thanks for the info everyone.... more research needed....on my part