Cummins missing & puffing

Brandon_M · Sep 14, 2017

Got a Dozer with a 4bt cummins in it. Was doing light grading work at my grandpas house. Today started it up & it ran maybe 2-3 minutes & started missing something awful & puffing white smoke out of the exhaust. The Dozer has been there for about 2 weeks & setting out in the rain. Today is the only day is hasn't rained in awhile. Is it possible that it's water in the fuel, maybe sucked a drug or something. I'm hoping it's just a fuel issue & nothing to major. Any help is appreciated

oarwhat · Sep 14, 2017

What does the smoke smell like? like diesel fuel or sweet like anti freeze ?

JS300 · Sep 14, 2017

Was there a rain cap on the exhaust?

Brandon_M · Sep 14, 2017

I never noticed the smell was to tore up over it. Yes the rain cap was on the exhaust but it wasn't sealed off 100% it was bent up a little. Never noticed that until today when I was searching looking for a problem.

oarwhat · Sep 14, 2017

Could just be a stuck injector.

Brandon_M · Sep 14, 2017

Could the rain going into the exhaust cause that? Like I said it has a rain cap but after looking I believe water was going down the exhaust pipe. Didn't know it was damaged until today

epirbalex · Sep 15, 2017

Brandon_M said:
Could the rain going into the exhaust cause that? Like I said it has a rain cap but after looking I believe water was going down the exhaust pipe. Didn't know it was damaged until today

Did it start running rough well after it was started , after a 3 minute period of smooth running ? What about when it started did it seem like it had a flat battery , as water in a cylinder some times seems like a battery problem as it compress's .

thepumpguysc · Sep 15, 2017

Just pull & drain the fuel filters into a bucket.. IF theres water in it, it'll show up quick in the bucket..
Just somewhere to start..

JS300 · Sep 15, 2017

Pumpguy is correct that will be the easiest place to start. We put a can over the exhaust. Started out with a flapper but they get bent to easy. I see dozers and tractors sitting around all the time with open exhaust pipes. You would think if it could hurt anything you would hear about rain in a cylinder more often.

Brandon_M · Sep 15, 2017

It started fine & quick, ran good for probably 2-3 minutes. Then started missing real bad & puffing white smoke. Then I shut it down & looked engine over, tried to start it just to see, it didn't want to crank over turned real slow like it was battery was weak. After that I didn't fool with it anymore until I searched the web for answers

DMiller · Sep 15, 2017

That sounds like coolant into a cylinder now. Have you checked coolant level? Smell at the stack for a sweet odor then report back.

Delmer · Sep 15, 2017

Yes, sure sounds like too much water in a cylinder. If the coolant is low when you check, then drain the rest of it, turn the engine over by hand if possible until it's free, then start it and loosen the injector lines one at a time at the injector to see which ones make it sound worse (or kill it). If you're real lucky it might be just a head gasket.

If the coolant isn't low, then see if it will turn over by hand, maybe the battery IS dead? Check the water separator, fuel tank drain, sediment bowl, filter, or whatever to see how much water is in the fuel. Water in the injection pump WILL make it miss and smoke.

Brandon_M · Sep 15, 2017

Ok, I'll check these things & see if it ever quits raining here . I'll post tonight what I find. Thanks for the helpful info. I hope it's nothing major, this is a brand new engine in this Dozer probably doesn't have a 100 hours on it yet.

DMiller · Sep 15, 2017

Brand new or reman? If either may be worth contacting supplier/installer.

MrKomatsu · Sep 15, 2017

is it an old international or a dresser td7?

MrKomatsu · Sep 15, 2017

thepumpguysc said:
Just pull & drain the fuel filters into a bucket.. IF theres water in it, it'll show up quick in the bucket..
Just somewhere to start..

should have a in-line filter against the frame and the inlet line should have a screen in the banjo fitting...just sayin

Coy Lancaster · Sep 16, 2017

Brandon_M said:
Ok, I'll check these things & see if it ever quits raining here . I'll post tonight what I find. Thanks for the helpful info. I hope it's nothing major, this is a brand new engine in this Dozer probably doesn't have a 100 hours on it yet.

Ok here I go probably make some mad but here it goes. The fuel system will not put water into the engine the pump will lock up long before that happens. You probably have either a bad injector or a blown head gasket. If you can get it to start crack each injector line one at a time and see which one lessens the smoke and doesn't change the miss. You did have a lot of good information on here so follow you gut and see what you find.

Brandon_M · Sep 17, 2017

Ok haven't been able to do much to the Dozer due to some family illness's. But I have figured out there's no water in the cylinder's & also the radiator is full hasn't lost a drop. Drained the fuel filters & had some water & gunk crap in them. Gotta change all them & get a starter solenoid for it too.

Delmer · Sep 17, 2017

So it turned over by hand, and the starter solenoid was making it crank slow?

Sometimes you can clean up the contacts in the solenoid and get it to work for a while.

Maybe the water doesn't get into the engine. The water separator and filters are supposed to stop water from getting through, hopefully that blockage is what causes the missing and smoke.

Coy Lancaster · Sep 17, 2017

Brandon_M said:
Ok haven't been able to do much to the Dozer due to some family illness's. But I have figured out there's no water in the cylinder's & also the radiator is full hasn't lost a drop. Drained the fuel filters & had some water & gunk crap in them. Gotta change all them & get a starter solenoid for it too.

You probably had a tip can't me off an injector.

Cummins missing & puffing

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