Diesel engine smoke on startup

The white smoke is due to unburnt fuel caused by improper heating. A marine diesel that shows a bit of smoke on start-up is probably nothing to worry about, but if it keeps on smoking after a few seconds of run-time, or starts smoking after it warms up, or when you throttle up, that engine is screaming to you to get something fixed. Diesel engines need high compression and heat for fuel combustion. When it’s cold outside and you notice white smoke at startup , then you probably have nothing to worry about. When the warm or hot exhaust gases meet cold outside air, condensation and steam is a result.

After a short amount of driving , the white smoke should lessen. Causes of Diesel Engine Smoke - By Color. A brand new diesel engine running at full load will experience a little bit of blow-by upon startup. Blow-by is a condition where diesel fuel , air and vapor are pushed past the rings into the crankcase of the engine.

A diesel engine in good condition should produce no visible smoke from the exhaust , under most operating conditions. A short puff of smoke when an engine is accelerated under load may be acceptable, due to the lag before the turbocharger speed and air flow is able to match the volume of diesel injected into the cylinders. I wondered about an oil leak into the engine , but the oil tank remains full.

The other possible is that I have been sold some crappy. Ad - White smoke occurs in a diesel engine when the diesel fuel goes through the engine and reaches the exhaust without having been burned. This typically occurs due to the engine being too cool to burn the fuel , often resulting from low compression in one cylinder, problems with the fuel injection timing or a defective fuel injector.

Project Farm 438views. Normally, it would happen at startup in cold weather with lower compression engines and retarded timing. Heavy duty diesels and most trucks emit some white or black smoke on startup or accelerating.

It is often a result of bad driving technique (lugging), poor injector maintenance, or excessive fuel delivery rates. It may also be a combination of all three. Gray, black, or white smoke emissions are warning signs. Once the engine is warmed up, the use of the glow plug is not necessary as the heat of the engine makes ignition of diesel fuel. If a diesel engine has a bad glow plug, it will create blue smoke at startup until it has warmed up.

Troubleshooting Cummins Diesel Engines. Water entering combustion spaces will also create white smoke. You might notice a burning smell on start up though. That’s quite normal because the ECU injects more quantity of diesel on startup. If the smoke goes away after some time, the engine might be fine.

White Smoke at Start-up and Short Term Driving Condensation that accumulates inside the exhaust pipes, converter and mufflers can produce a puff of white smoke upon diesel engine start-up. In very cold temperatures, the heated exhaust can freeze into minute fuel droplets when exiting the exhaust and produce a more prolonged emission of white smoke for a very short period of driving time. But mostly, it is the incorrect injector timing in the cylinders. What is the difference between White Smoke From Exhaust Diesel Engine and Petrol Engine ? White smoke from exhaust diesel and petrol engine may be the signal of different car problems. Basically, smoke from a diesel engine indicates that something is not right.

Blowing white smoke is a red flag for your diesel engine , yet we see this happen all the time to our customers. In many cases, white smoke emanating from the tailpipe (often at idle once the engine reached operating temperature) typically means a worn out injector. Perkins has a wealth of knowledge about diesel engines amassed through years of research, development and testing of its own models.