Cat Diesel Engine Blowing White Smoke

In many cases white smoke emanating from the tailpipe often at idle once the engine reached operating temperature typically means a worn out injector.

Cat diesel engine blowing white smoke.

What causes white smoke from exhaust when cold. Blow by is a condition where diesel fuel air and vapor are pushed past the rings into the crankcase of the engine. Blowing white smoke is a red flag for your diesel engine yet we see this happen all the time to our customers. Continuous light white smoke.

1 condensation burn off. Causes of diesel engine smoke by color. Continuous white smoke while driving is one of them. 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. 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. Any decrease in the pressure or delay in the delivery of the fuel to the combustion chamber will cause an incomplete combustion and you will have white smoke. This is a steady stream of a lighter white.

In order to run correctly a diesel engine needs precise timing of the injector pump and proper pressure. For example the 3208 marine engine rated 435 bhp 326 bkw has a camshaft that closes the inlet valves earlier. White smoke is typically not as much of a problem with electronically governed engines as it is with mechanically governed engines. This makes start up more efficient reducing smoke.

Or you re looking at a 20k engine repair. If you are having a diesel white smoke may be unburned fuel or coolant going through the engine. In the cold weather the white smoke can be quite normal but in some situations it is not. Really bad blow by could be the result of worn piston rings.

June 8 2020 at 4 36 pm. Here are 7 of the most common causes of a car blowing white smoke from the exhaust pipe.