Deere 2720 Smoke issue at startup

[Passattdi]

LD1, Snake oil has nothing to do with this. The fact is diesel combustion efficiency is very dependent on cetane rating, amongst a plethora of parameters. We are a community here trying to provide solutions, or at the very least a sense of direction, to situations that are brought to the fore. Opinions quite often get in the way of actual facts. Prove me wrong, on both counts…

This is correct. Cetane is a very important attribute during cold weather starts. A high quality cetane additive that actually raises that in diesel is important. US diesel fuel is not made for cars or small diesel engines. It is made for large over the road engines and construction equipment. There are many good products to raise cetane. There are a lot of crap products out there too. Stanadyne, Amsoil and a few others are good. Not going to point fingers at what I consider a waste.

LD1, if you consider what I stated here nonsense, ask yourself why the oil companies treat their fuel.

The op has not been back since the 24th. I also reread his posts. He is stating at ANY temperature it is now smoking and bucking. Warm temps a diesel will start and run well without smoke even without glows lighting off. There has to be low compression, dirty or bad injectors or a run of bad fuel to cause this, not just injectors.

 

[LD1]

LD1, Snake oil has nothing to do with this. The fact is diesel combustion efficiency is very dependent on cetane rating, amongst a plethora of parameters. We are a community here trying to provide solutions, or at the very least a sense of direction, to situations that are brought to the fore. Opinions quite often get in the way of actual facts. Prove me wrong, on both counts…

Im entitled to my opinion (which I shared) as are you. Dont have to prove anything to you or anyone. If the OP ever decides to come back and read, he can read your comment as well as mine and make up his own mind.

 

[Robin Veerman]

You are so right, Mister epic contributor…

 

[chrisbowers8]

Bumping my old post up as I finally had a pro do some diagnostic stuff. Compression is excellent and valves are within spec. The glow plugs were not getting to temp so I replaced those and also had already replaced the injectors. Thing still smokes like a banshee at startup when cold - much Moreso than my old International with the mitisubishi diesel. This Machine is a 2010. Only other thing I can think is injector pump - which is quite pricy. Or it’s just cold blooded. Either way probably something I will just live with?

 

[plastikosmd]

I have various diesels that smoke various amounts w cold, load, startup etc

I have no solutions but without a verified issue I would run it

 

[chrisbowers8]

Can the injector pump be adjusted on this model? It definitely seems to run rich.

 

[Tx Jim]

Did you install new OEM injectors or aftermarket injectors? Did you pressure test new injectors before installation? Have you checked inj pump timing. IMHO next step would be to put injection pump on inj pump test stand to check pump fuel delivery to injector lines or just ignore extra smoke.

 

[dieselade]

why don`t you wait until temps warm up to the 60`s and higher to see if it smokes at start up and then make a decision if it smokes or not.

 

[chrisbowers8]

why don`t you wait until temps warm up to the 60`s and higher to see if it smokes at start up and then make a decision if it smokes or not.

It smokes when warm or cold out and you can smell it running Rich even when the engine is warmed up. OEM injectors and glow plugs were put in. I’m pretty sure the timing was checked but I will ask.

 

[Bill Guenthner]

Hi everyone,

Before I go and pull the head off of this thing I wanted to see if there were any other ideas. My 2720 is absolutely belching out smoke at cold start and kinda rumbles a bit, almost like it's not running on all cyls - it smells like unburnt diesel. It does clear up once up to operating temp and the tractor seems to run just fine with plenty of power. My first thought was stuck injector. I pulled the injectors, they didn't look great, at least to my untrained eye, so I replaced them. No effect.

Then I checked the valves - they are all within spec and no oil is getting by the valve seats. It "Smells" literally like a fuel issue, but I'm not sure what else it could be? I was thinking of pulling the head to check for scoring, like if there was a bad ring where oil was getting by, but it doesn't smell like burning oil to me - it smells like fuel. Any thoughts would be appreciated.

My tractor has been smoking at startup since i bought it 11 years ago. I don’t worry about it. It runs great.