The use of glow plugs during cold startsand/or the use of a flushing solvent to remove engine sludge is recommended. 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. Be careful of white smoke as it will irritate your eyes and skin.
Unburned diesel fuel will make its way through the exhaust completely unused. Usually, white smoke indicates that the diesel fuel is not burning correctly. White smoke coming from the exhaust usually points to one point of failure: the injectors. Newer electronic diesel engines with common rail injectorssimultaneously match the speed of the turbo with the metered flow of diesel fuel into the cylinder. A small puff of smoke during quick acceleration is acceptable with older diesel engines due to a lag before the turbocharger’s air flow can match the increased volume of diesel fuel injected into the cylinders. Consistent smoke coming from the exhaust most likely indicates a deeper internal problem with the engine. This article will help diagnose the underlying causes of diesel engine smoke.ĭiesel engine smoke comes in three colors: white, black and blue. If there is smoke coming from the exhaust it could indicate a more serious problem with the engine. Consequently, a proper running diesel engine should produce no visible smoke from the exhaust. After a short period of break-in hours under load, the blow-by problem should correct itself. In a new diesel engine the rings need time to seat properly and develop an air-tight seal. Correct pressure should be maintained in the cylinder chamber in order for proper combustion to occur. Blow-by is a condition where diesel fuel, air and vapor are pushed past the rings into the crankcase of the engine.
#Whitesmoke color full
A brand new diesel engine running at full load will experience a little bit of blow-by upon startup.
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