Need Help with Tough Blue Smoke problem

[HEMI®Dart]

In a nutshell, the truck is acting like a gasser with worn rings. I can't really notice it in the daytime, but at night when there are headlights in back of me I can see Blue smoke when I accelerate from a stop. Not a lot, but noticeable. It is blue, not white or black.



The truck uses no oil. I changed it in November and have not need to add make-up oil since.



It does not smoke when started cold. Once it is driven it smokes.



The rings should be ok. I have changed my oil and filter every 3-5K miles since new, have used Synthetic since 25K miles. No noticeable vapor or blowby coming out of the oil fill tube & breather tube @ idle. Compression seems good. Truck performed well on the Dyno recently. I was thinking Valve seals, but its not using any oil.



Its gotta be fuel or fuel sytem related. ?



The engine oil does not seem diluted with fuel. The Fuel does not seem oily. Can't smell anything. Read that a worn lift pump with bad seals can suck engine oil out of block and send it into the fuel stream. Also an internal injection pump problem can do the same. I don't think either of these is the problem.





Turbo is 3 months old. Seals should be OK?



Overflow valve is 3 months old. Pressure is 24 lbs idle and 33 lbs rated speed.



I have tried different adjustments on the AFC, (starwheel, no-load fuel screw) Have not moved the AFC housing though. No

change.



Changed Fuel filter recently. No change.



Engine operating temp is about 160-170 degrees. Getting it hotter does not help.



Timing is at about 14. 7 degrees



I use Mobil Diesel. Additives (Cummins, Lucas, Howes, Amsoil ) don't seem to effect the blue smoke.





Anybody have any suggestions? I'm at wits end

 

[LSMITH]

What you are seeing is entirely normal. Most of what you are seeing is the particulates in the exhuast, soot. You are able to see some of the gasses too. It looks blue with the lights behind you but it really is a greyish black. You will be able to see it anytime there is a load on the engine. Don't worry about it IMO.

 

[Pthomas]

i second that

sure does look blue BUT those Halogen lights sure do change things. blue is oil and if your not using up any - well.....

 

[Diesel]

Agreed - not to be stating the overly obvious, but diesel IS an oil.



Steve

 

[HoleshotHolset]

Get someone behind you with HID's... . they more closely approximate the true color temperature of natural light... the smoke should change color then...



Matt

 

[Evan A. Beck]

Could be a bad seal in the lift pump, allowing oil into the fuel. Seen that one more than a few times.



Hmmm... HID's... I'll pull in behind you someday, and we'll check out that smoke.

 

[Vaughn MacKenzie]

Try using your schnoz

HEMI-D, when your truck is good and warm and starts smoking as you say, pull off and go take a good sniff of your exhaust. That should give you at least a decent clue as to what is going on:



If it is caused by fuel, such as an injector poorly atomizing and the fuel is not burning completely, it will smell quite rich, pungent and like diesel fuel.



If it smells stinky like the smoke coming from a sick gasser, well then it's probably oil.



If it smells like normal diesel exhaust, everything is probably fine.





Speaking of smelly, poorly burned diesel, I saw a well-aged bigrig fire up yesterday AM in the mid 20s. My oh my, talk about HUGE billowing clouds of stinky, smoldering-diesel smelling clouds of smoke



Vaughn