smoke on start up, blueish

[melmount]

I know this has probably been beaten to death but I will ask anyway. normally at first start up,especially, when cold I get the greyish smoke. I have no aih heater(early 99) etc. Today, I noticed blue smoke. It was definately blue.
Whats the usual cause of this? Injector O-rings? Turbo seal? I will pay attention to it and if theres any oil consumption. The motor runs very well. Starts great, never plugged in. It was probably high 30's this am when i noticed this. Its usually just grey.

[03_Turbo7.3]

mine does it every now and then too...id almost say its just a normal part of life with our trucks..theres a few guys on here that will chime in..theres a few seals that would make it go do that..

[lcducote]

nothing to worry about. if you plug it in it wont blow any smoke. the problem is with your glow plugs or the glow plug relay. if you don't plug it in then the smoke will get worse and continue blowing until the truck is warmed up. you probably just have a bad plug or two. but like i said, there is no real concern here.

[melmount]

it had ran for 5 minutes allready(approx) when the blue smoke started??
It starts up fine. Runs well too. No sputters, nothing. I was wondering if The injector O-rings could be going south?

[D3R3K]

usually you get blue somke from the valve seat seals going bad and dripping into the cylinder when its off for a while,
constant white smoke it coolant
blue smoke it oil
black smoke is fuel

[melmount]

yes, correct if theres engine wear, wont the injector seals also cause it? maybe?
The motors all, or almost all, seem to smoke whiteish at start up when cold? thats not coolant? i do aggree whites coolant but I have told that whiteish is just from being cold at first start up of the day?

[D3R3K]

yes when its cold it will smoke white

[Jake]

If its cold it will smoke blueish white until the engine warms up some. Its caused from low combustion temps, its just unburnt fuel.

[ju015dd]

mine smoke like a frieght train when cold and really bad when it get super cold 30 or below.

[Jake]

30, super cold? Thats almost warm here this time of year.