Diesel why black smoke

This article will help diagnose the underlying causes of diesel engine smoke. Diesel engine smoke comes in three colors: white, black and blue. Consistent smoke coming from the exhaust most likely indicates a deeper internal problem with the engine.

Newer electronic diesel engines with common rail injectors simultaneously match the speed of the turbo with the metered flow of diesel fuel into the cylinder. White smoke coming from the exhaust usually points to one point of failure: the injectors. Usually, white smoke indicates that the diesel fuel is not burning correctly. Unburned diesel fuel will make its way through the exhaust completely unused.

Be careful of white smoke as it will irritate your eyes and skin. If white smoke occurs during a startup in freezing temperatures, then goes away, it usually indicates frozen deposits of soot which expanded around the rings then burned away once the engine warmed up. Black smoke, unlike white smoke, contains a high concentration of carbon exhaust particles.

The combustion of diesel fuel in the cylinders breaks down the long chain of carbon molecules to smaller and smaller molecular chains. When the exhaust leaves the engines the byproduct is a combination of carbon dioxide and water. Our AW10 Antiwear achieves this for many of our customers. Some causes of this include. Water entering combustion spaces will also create white smoke.

Faulty head gaskets and cracked cylinder heads or blocks are a common cause of water entry, and are often to blame. Unfortunately, expensive mechanical repair is the only proper solution here. It is evident as pressure coming out the crankcase ventilation tube, valve cover breather or dipstick tube. Engine oil leaks can also result from excessive cylinder blowby, as the excess pressure finds the weakest point.

Some causes include. Cost Effective Maintenance has demonstrated that excessive blowby in these units can be minimized at low cost and without downtime. Diesel Smoke tells YOU a Story Diesel smoke like blowby and oil use is a worrying engine symptom which indicates that an engine is not running well, and its service life is likely to be shortened considerably, unless remedial action is taken.

This pack will stop your diesel blowing smoke or your money back! Simply add to your fuel and oil and the problem is solved. Should my engine be blowing white, blue or black smoke? What does it mean if my engine is blowing blue smoke? Worn valve guides or seals Wear in power assemblies i.

Some causes of this include Faulty or damaged injectors Incorrect injection timing could be a worn timing gear or damaged crankshaft keyway. What is Blowby Smoke? Get in Touch! Cost Effective Maintenance. Skip to content Step on the accelerator of your diesel-powered vehicle and a plume of black smoke may emit from the tailpipes. The Science Behind the Smoke Black smoke represents partially burned fuel.

Instead, add it to a blue-covered tap, which is typically located next to the fuel receptacle or under the hood. The water vaporizes, leaving ammonia molecules, which then move to the catalytic converter. Once in the converter, the nitrous oxide molecules are converted to nitrogen and water vapor, which are less toxic.

Nitrogen and water vapor are then emitted through the tailpipes. Categories Know How Tags DEF , diesel , diesel engine , diesel exhaust fluid , diesel fuel , emissions , fuel , pollution. Related Articles. Matthew C. Leave a Reply Cancel Reply Your email address will not be published.