Diesel puffing white smoke

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. 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. Continuous white smoke while driving is one of them.

If you are having a diesel , white smoke may be unburned fuel or coolant going through the engine. But mostly, it is the incorrect injector timing in the cylinders. Fix that it keeps the crack inside. 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. The most noticeable symptom of internal coolant leakage is when the white smoke is billowing out of the exhaust pipe and leaves a sweet odor in the air. If it is smoking out the tailpipe, that means that either coolant or a bunch of excess fuel is getting.

Diesel Engines Blowing White Smoke from Exhaust. WHITE SMOKE occurs when raw diesel comes through the exhaust completely intact and unburned. Some causes of this include. Sometimes diesel engines emit a white smoke while starting. The white smoke is due to unburnt fuel caused by improper heating.

Diesel engines need high compression and heat for fuel combustion. It can be especially difficult to start a diesel engine during cold weather. The commonest cause of white smoke is likely injector pump timing. In order to function properly, a diesel engine needs precise timing of the injector pump and high pressure. So, any decrease in the pressure or delay in the fuel delivery to the combustion chamber will result in incomplete combustion, leading to white smoke.

The unburnt fuel particles blow out the tailpipe producing a rich, thick, diesel fuel odor. White smoke generally happens when there is not enough heat to burn the fuel. It is normal to see white smoke from the exhaust during sub-zero and colder weather, at least until the engine warms up.

Check the fuel injectors. This causes white smoke. They may have worn out. Replacing the injectors will reduce it. Or there could be some cylinder glazing (especially if it disappears when the engine warms up).

I spoke with a couple of mechanics and searched on line and it was eluded too that the problem was in fuel system. I drained the water separator on filter and the problem stopped until this week. I do however disagree.

I think you are being a bit too dismissive about the whole white smoke issue.