Blue smoke on cold start/cold outside

[Coyote machine]

Injectors and crankcase oil have no relationship beside the oil viscosity in cold weather possibly making a difference in how fast the engine can turn over on cold start, with no other aids besides glow plug cycling.
Injection pumps are lubricated by the fuel flowing through them, not crankcase oil.

 

[Raincoast]

Brain fart.... Post deleted

 

[KubotaToy]

???? Unless i am missing something the engine oil should have NO effect on injector operation.

The injectors are opened and closed by the injection pump which pops them open at a specific diesel pressure ( excluding new common rail).

New common rail injectors are triggered electrically to open the injector.

I have noticed much quicker starting with synthetic 5w-40 oil in the winter but don't believe it has anything to do with the actual injectors... jmo and:2cents:

Well, the oil reference was my poor attempt at a little humor (oil thread reference that the right oil fixes everything), maybe it was the turkey or staying up to late reading threads but it did not work. The real point was I did have a sticky injector that caused blue smoke on startup for few minutes.

 

[liberty2701]

I have a tier 3 dk50 hst cab, 1000hrs. Since first COLD start 8 or 80 I have the same smoke but for only about 30 sec. It is 4 yrs old this month. Every 100 hrs oil, air and fuel filters are replaced with oem filters. I always use a fuel treatment with every fueling. On warm starts never an glow plug action and never any smoke. I have been to two dealers about the COLD blue smoke. Both have checked g/plugs, complete fuel system, timing and the first dealer replaced all injectors. I have been told by both that the 50 hp as a elevated throttle and richer mixture on cold start. From the first COLD start at the dealership till the 65 degree day today. She is still blowing 30 seconds of blue smoke at cold start and none on warm start. Air temp has 0 effect.

Did you watch my video? Does yours look like mine?

 

[Coyote machine]

Well, the oil reference was my poor attempt at a little humor (oil thread reference that the right oil fixes everything), maybe it was the turkey or staying up to late reading threads but it did not work. The real point was I did have a sticky injector that caused blue smoke on startup for few minutes.

ROFL :chicken: (supposed to be a Turkey) How's that?:laughing:

 

[JMER817]

Show the video to your dealer and demand that they fix it. Better yet email it to them so you have proof that there was an issue while under warranty in the case something else comes about related down the road.

 

[chubby]

liberty2701 yes but not as long and yes I swear it seems like it starts on three cyl then picks up the fourth but after the cold (first) start NO more smoking until next cold start

 

[Coyote machine]

liberty2701 yes but not as long and yes I swear it seems like it starts on three cyl then picks up the fourth but after the cold (first) start NO more smoking until next cold start

It probably is firing on three cylinders on first cold start of the day. And it probably has a clogged injector on the fourth cylinder that has a bad spray pattern or faulty opening pressure.

 

[GManBart]

Here is a simple test. Park the tractor in a heated garage overnight and then start it.
I bet the unburned fuel smoke and sputtering at startup miraculously disappears.
My DK 35 does the same thing when I start it in the cold in my unheated pole barn.
If I start it outside in the cold it still smokes at startup you just can't see it nearly as much as when inside

Why would he bother wasting time on that? He already said that it did the exact same thing in July.

 

[DK35vince]

Why would he bother wasting time on that? He already said that it did the exact same thing in July.

Don't then.
The video looks like a cold weather start thing to me.