Dk50 HSt Blowing blue smoke

[coobie]

A diesel fuel additive, good feedback on Amazon:

Amazon.com: pri d

Got it,thanks.

 

[liberty2701]

Question what is PRI D you state you use in your diesel?

Pri D is probably the best diesel additive available today. I use it all year long on stored and unstored fuel. What do you mean it could get costly? Damage from bad fuel? Funny thing is I have already used 15 gals out of the drum previously. Plus the drum is stored indoors in a heated garage.

 

[coobie]

Pri D is probably the best diesel additive available today. I use it all year long on stored and unstored fuel. What do you mean it could get costly? Damage from bad fuel? Funny thing is I have already used 15 gals out of the drum previously. Plus the drum is stored indoors in a heated garage.

My point is that if Kioti can prove that if your diesel fuel was contaminated the cost to repair any damage might be on you.Hopefully not.

 

[coobie]

I also want to add that I use a diesel additive (opti-lube)year around in my outside tanks and have had no issues yet.

 

[sdef]

I use Pri-D and Opti-XPD in my diesel 5 gallon cans which I store in and use Pri-G in all gasoline storage. I consider them all relatively inexpensive insurance. Pri products are favorites of preppers, of which I am one.

The ethanol laced gasoline has proven good numerous times after 18+ months of storage. Diesel has been stored about half this time, so far. I have read quite a few articles that state because diesel is less volatile than gasoline, storage chemicals are really not needed. Again- relatively inexpensive insurance.

 

[coobie]

I use Pri-D and Opti-XPD in my diesel 5 gallon cans which I store in and use Pri-G in all gasoline storage. I consider them all relatively inexpensive insurance. Pri products are favorites of preppers, of which I am one.

The ethanol laced gasoline has proven good numerous times after 18+ months of storage. Diesel has been stored about half this time, so far. I have read quite a few articles that state because diesel is less volatile than gasoline, storage chemicals are really not needed. Again- relatively inexpensive insurance.

Thanks for the info on Pri-D.I guess I am somewhat out of touch on the ethanol based products.I use sta-bil marine grade or starbrite products to reduce the ethanol.Thanks again,great info.

 

[MinnesotaEric]

Here I am operating My new Dk 50 with 30 hrs and yesterday it started blowing a little blue smoke. Today it blows smoke like a chimney, especially at 2500 rpms. It got worse and I am so far very disappointed with this tractor. I know blue smoke is oil. This is not a good sign. I am going to call the dealer first thing tomorrow. Any ideas on this one?

After confirming oil level is correct, not overly filled, I bet you have a bad out-of-the-box valve guide or umbrella or a stuck oil control ring, or a gasket or O-ring failure in your high pressure fuel pump (if it can leak into your intake runners on failure, that is).

Anyway, your dealer will puzzle it out.

Stuck oil control rings were super common in Hondas, like it was a feature.

BTW, blue smoke is oil, black smoke is unburned hydrocarbons. Unless your additive burns black, I'm sticking to my guns. Quick way to check, is to dump your fuel, and put in known fresh fuel. If the smoke goes away, you know the path to take to perform a blue smoke exorcism on your new tractor.

 

[ritcheyvs]

As a point of information, defective valve guides and valve guide seals rarely produce serious smoke in Diesel engines. Without a throttle to restrict air flow during the intake stroke, Diesels create very little vacuum in the cylinder so they can't to suck much oil down the valve stem. Gasoline engines, on the other hand, typically idle with 30 inches of vacuum in the intake manifold and that can suck any available oil down the valve stem and into the cylinder.

Eric is right about stuck (or broken) rings. That would likely be the most difficult repair so hopefully that's not the problem here.

In Diesels, unburned fuel (which is, after all, oil) will produce blue-white smoke. If the fuel won't burn because it is poor quality or poorly atomized you'll get smoke. A defective injector (broken, wedged open, etc) or upstream fuel restriction can prevent proper atomization. Bad compression or a cold engine will also prevent complete combustion.

Black smoke is usually incompletely burned (as opposed to unburned) Diesel fuel where there was more fuel than air in the cylinder. The hydrogen burns off first leaving carbon (soot) in the exhaust. This produces a little more power than injecting less fuel (but poor economy) so you'll often see big trucks blow carbon when they demand max power.

Water (coolant) in the cylinders will also produce white smoke, which is mainly steam. Coolant (glycol) in the cylinders will cause damage.

 

[sdef]

...Black smoke is usually incompletely burned (as opposed to unburned) Diesel fuel where there was more fuel than air in the cylinder. The hydrogen burns off first leaving carbon (soot) in the exhaust. This produces a little more power than injecting less fuel (but poor economy) so you'll often see big trucks blow carbon when they demand max power.

So that explains why performance diesels (tractor pulls, etc.) have black smoke pouring out of the stacks. I would have thought too rich of a mixture would have cost some power.

 

[liberty2701]

Dealer called and said fuel looked ok. They said smoke cleared up some. They are waiting on an additive from Kioti to put in the fuel. Fuel already has Pri d and Howes in it so not sure if this is going to help. We shall see.