I have a Dodge Cummins with common rail injection. I bought the truck used from a dealer. I am having trouble with white smoke coming out of the exhaust. It started as minor smoke on start up and now all of the sudden it has major white smoke and when I get it up to operating temp it will smoke even more like a white chimney. I first changed the fuel filter and added diesel kleen but that didn't change it. Then I for the past month with driving the truck on and off I have not noticed any coolant consumption. I talked with a diesel tech and he said it could be the injectors. So i tested the electrical solenoids and got 0.4 Ohms on all of them so no problem there. Then I took a stethoscope and listened to each individual injector and use an IR gun. I found 3 bad injectors that were clacking with the engine really bad or were hotter than the other cylinders with the IR gun. Now that I have replaced 3 out of 6 my EGTs are alot cooler than they used to be and the truck has smoothed out it used to have a dead miss and the engine would shake, etc. I have no DTCs in the vehicle. I need to know what to do next so I can get this white smoke gone!!

 

For got to mention the truck is 2005 Dodge Cummins with Common Rail. Odometer is 236,000. No mods except 5 inch exhaust. Edge CTS with Attitude. Everything else is stock.

 

Replace the other 3. They're probably all bad at 236k with stock lift pump and filters.

 

NEVER REPLACE JUST ONE OR TWO INJECTORS! Buy a whole set scope the cylinders when you pull them out! Look for melted pistons! DO NOT SKIP THE INSPECTION!
WHITE SMOKE IS UNBURNT FUEL! LACK OF COMPRESSION DO YOU HAVE BLOW BY ?? Sounds like you already melted a piston!

 

yea I have a little excessive blow by it smokes white out of the blow by hose

 

And on the 3 injectors I replaced I don't own a scope so I didn't check them

 

Quick question do you think I need to do a compression test since I don't have a bore scope? Or just replace the remaining 3 injectors and pray? haha

 

Sorry dude your motor is toast! Drive your truck to San Diego spend a week at the beach or whatever and I'll drop a new motor in for you! Oh and bring cash! Lots of cash!