Hey guys hope to get some help from you all. I notice that my 7.3 excursion smokes a little at start up. It kinda looks whiteish and seems to do it when it's cold. I checked the compressor wheel and the bearing seems to be ok. What do you think could cause it?

 

Unburnt fuel if it's white. I think all 7.3's do that when cold. And it clears up after a few minutes too I bet. That is simply the nature of a 7.3. No need to worry about it.

Now if it has a bluish look to it, then it's likely oil, which is a sign of either piston rings (not likely), turbo seal going out (possible), or injector o-rings (most likely).

 

Thanks. Kinda thought it was that. Just wanted to make sure it wasn't serious.

 

I own 2 and both have done that since day one in cold weather!!

 

Mine will puff a little white smoke for maybe 3 seconds when its cold out.
I figure I have a few bad glowplugs.
A few minutes of white smoke sounds like an issue to me

 

Could be cracked injector cup or cups. Is there any fuel in your coolant resevoir. This is a tell tell sign of cracked injector cups. I am going through this myself right now. I noticed the fuel in coolant first but when the weather started getting cooler my truck would smoke white smoke until it warmed up. I hope this helps.

 

Mine will puff out white smoke at idle when it's cold out for a few minutes. I'm talking about 30 degrees and below. Both of them have always done that. When it's in the low teens or below, they put out white smoke all the time idling. But then, every vehicle I have ever owned would do that. I assumed it was because of the cold.

 

my truck blows a little black smoke when I start it for the first time in the day when its cold out. From what I hear is normal and has not seemed to cause any problems and goes away after a few seconds of idling.

 

You hit the nail on the head. My 7.3 (sold) would do the same thing when cold. After it warmed up, it would never happen.

 

I just noticed mine doing this in the cold, just a puff of smoke at startup, then it goes away.

 

The OP truck is normal, yours sounds like trouble.

 

Eric, mine will puff a little white smoke if it's cold, pretty cold. It quits immeadiately and all is well. Probably the nature of the beast.

 

Thanks Bob and everyone

 

mine DID the same exact thing, we even tried to fix it at ocktoberfest with new GPs and 2 new UVCH at my house. i just(friday) installed a NEW chip and now...not one bit of smoke. it was 35 yesterday am, and 27 today am. always thought "its the nature of the beast," but i guess not.