Exaust Smell?

[Jackpine]

Originally Posted by 88Racing

DJ Soutthpaw may have a better grasp on this. But if you would like to compare it to leaded and unleaded gas. Here it goes: when unleaded hit the market in the 70's a lot of cars from then and on back started to experience head problems(valve seats and valves) due to overheating. Well they took away the lead that acted as a lubricant for those parts. So maybe sulfur and some of the other chemicals due to the reduction of them the same thing is happening in diesels. Have you noticed in the last 3 years they want diesels to burn hotter to get rid of more of the byproduct junk. That's on the exhaust end.

This "burning hotter" is kind of a "damned if you do, damned if you don't" thing. At least in gassers, hotter burning causes nitrogen, which is normally pretty inert, to combine with oxygen to form nitrogen dioxide, a toxic pollutant. I wonder if it does the same in diesels.

The EGR system in gassers was developed to cool the combustion process slightly to reduce formation of this gas. (Of course it also cuts power).

Oh, your earlier question Lars - I can't imagine why a diesel would not produce some sulfur dioxide if sulfur was present in the fuel.

- Jack