Blue smoke on cold start/cold outside

[DK35vince]

I know there is a problem. The OP described it already. It's intermittant, happens in July, which makes no sense regarding glow plugs and block heaters, since neither is needed in northern New England in July.
Just let the OP take it to his dealer to fix it, and stop trying to argue with me - I'm not going to go round about this with you.

Your Cat diesel has little to no bearing on this tractor situation.

Your entitled to your opinion and I'm entitled to mine.

 

[Jerry/MT]

Good plan. Same to you!



Sorry, the block heater won't cure a problem that shows up in July. The OP needs to get his selling dealer to test his injectors, while under warranty, and fix the problem.

He had one instance where it happened in July and his dealer claimed "bad fuel". He consistently has a problem in cold weather. In the original post, he said it ran fine all summer. In a later post he said it only happened in cold weather. It's possible he has a problem with an emission control and that could explain the July instance which was attributed to bad fuel.
Diesel's don't like starting in cold weather and that's the nature in of the beast, independent of the color of the paint. It's just physics. That's why our NH has both Thermostart and a block heater. It's a fact that starting a diesel with the block heater as a starting aid will provide an easier start in cold weather than using no starting aid. Heck I don't own stock in block heaters but I think it will help this poster's cold weather starting problem.

If he wants to get wrapped around the axle with warranty claims for this problem he'll have to have lot more problem than he's having, notwithstanding a possible emission control problem.

 

[liberty2701]

I appreciate all the responses. The tractor starts instantly in the cold. Unlike my Masseey which took half throttle and alot of cranking. I love the fact that it starts so easy. I just wish i did not have to clear the area for 15 min till the smoke clears. I will contact the dealer and show him the video and see what they say.

 

[Citydude]

I appreciate all the responses. The tractor starts instantly in the cold. Unlike my Masseey which took half throttle and alot of cranking. I love the fact that it starts so easy. I just wish i did not have to clear the area for 15 min till the smoke clears. I will contact the dealer and show him the video and see what they say.

That is a good plan of action. Please let us know what you find out.

 

[Coyote machine]

I appreciate all the responses. The tractor starts instantly in the cold. Unlike my Masseey which took half throttle and alot of cranking. I love the fact that it starts so easy. I just wish i did not have to clear the area for 15 min till the smoke clears. I will contact the dealer and show him the video and see what they say.

Do you happen to know what year your tractor was manufactured? Is it a tier 3 model? If not, if you provide the serial # we can tell you when it was manufactured. This info bears on what emissions related equipment is on the unit. Note that all emissions related equipment, including parts like injectors, carry their own warranty for performance and defects, separate from the tractor warranty, and are in most cases longer in time/hours than the manufacturer's warranties.

As an example, my 2010, Tier 3, DK-40 starts easily in all weather and temperatures, it has nearly 900 hours on the clock, and combined with the 350+ hours I had on my DK-35, I've clocked nearly 1300 smoke free hours on two Kiotis, since May of 2009. I have used the glow plug circuit on occasion, though seldom twice, and have never used the block heater my dealer installed. Granted, my barn has radiant heated floors, and is kept at 50 degrees in winter.

When left outside overnight, which is very rare, it starts with just use of the glow plug circuit, and doesn't smoke like yours does at all. A puff of black smoke on initial crank and start, but never any blue smoke, and what smoke there is is very short duration.

I strongly urge you to follow up with your dealer to determine exactly what is causing your prolonged smoking issue and have them solve it to your satisfaction, ASAP, and while under warranty. I guarantee you this is a resolvable problem.

 

[DK35vince]

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

 

[liberty2701]

It is definitely tier 3. I purchased it May of 2014.

 

[KubotaToy]

I had a MF that smoked like that on cold startup, turned out two things, dealer thought it was a injector spool valve sticking, then asked what oil I was using, told me to quit using 15w40 and go with either 10w30 or 5w40 in the winter, changing oil cured about 90% of the problem, but one injector was bad, causing puffing smoke on cold startup. I have not smoke on my Kubota's on startup but have always used 5w40 oil year round since new. Apparently, injectors can be very picky about oil and be slow to operate with certain oils.

 

[chubby]

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.

 

[sd455dan]

I had a MF that smoked like that on cold startup, turned out two things, dealer thought it was a injector spool valve sticking, then asked what oil I was using, told me to quit using 15w40 and go with either 10w30 or 5w40 in the winter, changing oil cured about 90% of the problem, but one injector was bad, causing puffing smoke on cold startup. I have not smoke on my Kubota's on startup but have always used 5w40 oil year round since new.





Apparently, injectors can be very picky about oil and be slow to operate with certain oils.

???? 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: