DC199512V87

upon startup especially at temps below 5C truck smokes blue on idle, mostly just a noticable haze. if i drive it for a bit (5-10 min) it no longer smokes at idle, but will defenitly smoke blue at higher rpms, particularily when downshifting and holding the throttle lightly to match rpms. lots of blue when the truck is fully warmed up all this disappears and it runs great no smoke anytime, except some black now and then is this normal especially since i have a straight pipe? or is it rings or turbo seals? i know most diesels smoke some and burn oil a bit but this is just a bit too much for comfort. thanks guys.

ps is it possible to post a vid on here? would b nice if u could c the amount of smoke and perhaps make better analysis?

Diesel_Power_2

Hi,
My 97 last winter when around 20 or so for a while my truck "when cold" would put out ALOT of blue I mean literally like a James Bond smoke screen until warm. I have done 2 oil changes this last year and have put some miles on the truck it gets better and better and likes to be driven I can tell.

DC199512V87

Kinda hoped it would b just cold motor and lack of a cat and not an underlying condition that would go away when the motor was warm enuf to burn the oil and make it seem like the problem went away. I hear u on the blue smoke screen man

9812vram

It's normal for a mechanical diesel to smoke blue when it's real cold. Cold air and cold fuel combined with the pump timing means there's not enough heat to ignite/burn all the fuel properly. Blue smoke doesn't always mean burning oil.

Blue smoke in cold weather is a sign of low combustion temps.

SIXSLUG

I agree. Our equipment kicks out a blue haze in the winter regardless of age or hours.
If it is turbo seals , rings, etc you should be able to watch your oil level go down pretty consistently between changes, or switch to full synthetic and see if the smoking stops. Synthetic doesn't burn blue.

joem

yup, blue smoke when cold is just incomplete combustion. thats why the 24v engines have a 3 cylinder idle mode, sounds like a kubota but keeps the temps up

infidel

Sounds like your only problem is a cold engine.
I wouldn't worry unless you were using a few quarts of oil between changes.