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Diesel engines can produce black soot (or more specifically diesel particulate matter) from their exhaust. The black smoke consists of carbon compounds that have not burned because of local low temperatures where the fuel is not fully atomized. These local low temperatures occur at the cylinder walls, and at the surface of large droplets of fuel.
According to AutoZone, white smoke signals a cooling system issue, blue smoke signals burning oil, and black smoke signifies fuel in the exhaust. Arkadij Schell/istockphoto 11.
Exhaust gas or flue gas is emitted as a result of the combustion of fuels such as natural gas, gasoline (petrol), diesel fuel, fuel oil, biodiesel blends, [1] or coal. According to the type of engine, it is discharged into the atmosphere through an exhaust pipe , flue gas stack , or propelling nozzle .
Blue smoke from the exhaust suggests that excess oil is entering the combustion chambers (although there are other possible causes than a head gasket leak). White smoke from the exhaust suggests that coolant is entering the combustion chamber. Head gasket leaks are classified as either external or internal.
As early as the 15th century Leonardo da Vinci commented at length on the difficulty of assessing smoke, and distinguished between black smoke (carbonized particles) and white 'smoke' which is not a smoke at all but merely a suspension of harmless water particulates. [64] Smoke from heating appliances is commonly measured in one of the ...
In severe cases, you might even smell a burning scent or witness smoke coming from your PC's power supply exhaust vent. If you use a laptop with PSU issues, you cannot send your computer to a ...
When the flame moves backward it may also be called a "pop-back". A backfire can be caused either by ignition that happens with an exhaust valve open or unburnt fuel making its way into the hot exhaust system. A visible flame may momentarily shoot out of the exhaust pipe. A backfire is often a sign that the engine is improperly tuned.
I first reported a streak of white smoke, which I identified was condensing exhaust gases coming from what I thought was the enemy aircraft. This streak was about 14 miles (23 km) ahead and to the starboard of me-I was about 2 miles (3.2 km) behind Blue 1, as my engine was not giving full power.