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Everyone suitably surprised, yes?!

The vehicle will be fine to drive. But, as I mentioned yesterday - when others were running circles on defining smoke colour - monitor engine oil level!!

I may be wrong, but I also disagree with Pops above, I highly doubt this is anything to do with injectors. I think this vehicle has been overfilled with oil, simple as. Why search for another fault? Do you really trust someone never to make a mistake in a dimly lit garage, with new/clean oil being difficult to view on the dip stick.....? I personally measure mine, so mistakes on oil fill is not possible.

Look for issues later. We have no symptoms, so why search for a fault which may not be there. Just sort the issue you do know about.
 

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2016 Nissan Navara D23 NP300
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Discussion Starter #42
Everyone suitably surprised, yes?!

The vehicle will be fine to drive. But, as I mentioned yesterday - when others were running circles on defining smoke colour - monitor engine oil level!!

I may be wrong, but I also disagree with Pops above, I highly doubt this is anything to do with injectors. I think this vehicle has been overfilled with oil, simple as. Why search for another fault? Do you really trust someone never to make a mistake in a dimly lit garage, with new/clean oil being difficult to view on the dip stick.....? I personally measure mine, so mistakes on oil fill is not possible.

Look for issues later. We have no symptoms, so why search for a fault which may not be there. Just sort the issue you do know about.
Definitely not something I even considered at all when having the issues, so thanks for pointing out to check engine oil levels.

From this point, any smoke would likely be related to the vehicle burning off any extra, yeah? Once that’s all burnt off, given I’ve dumped a fair bit it should gradually lose the smoke back to clear? As there is still smoke to a degree, so that’s the only issue I can think of, as beyond that there isn’t anything else that I can think of.
 

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The oil will be sitting absolutely everywhere, but as you say, should burn off from hot areas or dissipate from other locations, in time.

An over filled engine is an extremely unhealthy and seriously unstable one, at that time. There is absolutely nothing you can do right now to prove/disprove any other faults. Unless you fancy wasting some money ripping out and testing injectors. I would personally wait until there was a sign that you had an injector issue in the first place!

You have done what should have been done. Allow the truck to run gently, and closely monitor everything.
 

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Discussion Starter #44
The oil will be sitting absolutely everywhere, but as you say, should burn off from hot areas or dissipate from other locations, in time.

An over filled engine is an extremely unhealthy and seriously unstable one, at that time. There is absolutely nothing you can do right now to prove/disprove any other faults. Unless you fancy wasting some money ripping out and testing injectors. I would personally wait until there was a sign that you had an injector issue in the first place!

You have done what should have been done. Allow the truck to run gently, and closely monitor everything.
Okay no worries, will let it do it’s thing and see what happens over coming days in terms of oil levels. Will try the cold level in the morning, as I hadn’t captured that as yet.

I will leave the injector side for now, as I have put fuel cleaner through post low Sulfur fuel, and today put the diesel purge directly into the fuel filter so will give the remainder of this tank as is, then monitor that side when I put a fresh batch of good quality fuel through, minus the fuel cleaners which will throw out usage.

As a side note, does the oil overfill explain in some way the increase in smoke at idle/acceleration up incline? Or is the amount of smoke in the videos just a diesel thing? This is personally my first diesel.
 

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I think it seems like all smoke was blue, is oil being burnt off which could easily be the cause of all your smoke issues. The lower the revs, the more chance the excess oil has to "pool" in certain areas.
 

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Discussion Starter #46
I think it seems like all smoke was blue, is oil being burnt off which could easily be the cause of all your smoke issues. The lower the revs, the more chance the excess oil has to "pool" in certain areas.
Okay, sounds about right.
I would say the 3/4 failed glow plugs were a separate coincidental finding, or maybe they too were stuffed but were part of the overall problem but not the problem itself, as they were definite dead.

I will monitor oil levels the next week or so, see how it all goes with improving smoke wise, and go from there. At this stage it looks like I can’t do much more than wait and see what happens, and going by what you’ve said there isn’t anything particularly catastrophic that would mean the vehicle is inoperable whilst I am away for work, and the family is using the vehicle.
 

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Indeed, you may have existing or previous glow plug issues, but there is no connection to smoke with this. Dead glow plugs will only cause starting issues. They come on briefly before start up, and never come on again until next time they are needed for heating during a start cycle.

Yes, closely monitor and check everything.
 

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I might disagree. Faulty glow plugs would mean that the engine will not be burning the excess fuel that the injectors add on a cold start.

Some of the excess fuel ends up in sump.
 

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Discussion Starter #49
I might disagree. Faulty glow plugs would mean that the engine will not be burning the excess fuel that the injectors add on a cold start.

Some of the excess fuel ends up in sump.
Given that the glow plugs have all been replaced after initially finding three out of four were not showing any readings via multimeter, with nil lighting of the test light on testing, this should have eliminated that potential? The circuit, module, and wiring was all checked then too, and there is a video from a previous reply that showed no smoke at all on cold start, so could this still be occurring?
 

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I feel this issue should be OK now. I am pretty convinced that the engine was simply over filled with engine oil.
 

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OMG ....
...checking for leaking IC or pipes😉
Sorry Pops, I would recommend you re-read the entire thread. If I'm not mistaken, you were trying to get the guy to rip out his injectors!!

My only two advisories were boost pressure leaks, and, wait for it.... engine oil level check!

OP - Please keep us informed!
 

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I might disagree. Faulty glow plugs would mean that the engine will not be burning the excess fuel that the injectors add on a cold start.

Some of the excess fuel ends up in sump.
I do understand your thinking here; but do you think the duration is long enough? It must be split seconds during initial start, for this tiny quantity of diesel to wash the oil.
 

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I feel this issue should be OK now. I am pretty convinced that the engine was simply over filled with engine oil.
Hopefully so , I think a long trip and getting up to a decent temperature would help get the remaining oil sorted sooner rather than later . Not good for DPF to have oil sitting in it and only slowly burning off. We had a ride on mower overturn a couple of weeks ago it took two hours before you could see it cutting grass again due to the smoke.
 

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Discussion Starter #55
I feel this issue should be OK now. I am pretty convinced that the engine was simply over filled with engine oil.
Cheers, will monitor over next week and go from there 👌🏻 The thread took a wild turn, but hopefully the combination of issues have all sorted themselves now at least for the time being to see the after effects slowly diminish over time.
 

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2009 Navara Spain built, 2.5ltr turbo diesel
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Afternoon,

Been having an issue on and off for a while now, white smoke (over last three weeks) and a strong diesel smell when standing beside car/idling for the last few months.
Vehicle is a 2016 Nissan Navara D23 NP300, running a YS23DDTT with 148,000kms.

The moment that started it all, going by the days happenings:
  • Accidentally used Low Sulfur Diesel, but didn't think anything of it
  • Used a trailer that may have had dodgy wiring
First issue was the following morning, large plumes of white smoke on acceleration up an incline shortly after starting.
On scanning with scanning tool, found P0380 Glow Plug/Heater Circuit A code.


View attachment 64329

Over the last few weeks, I have checked/fixed/replaced the following:
  • Checked glow plug relay with test light, three of the four plugs were not lighting up
  • Checked actual glow plugs, three out of four were indeed not glowing at all
  • Purchased and replaced with genuine Nissan replacements (this made the issue better, less smoke but still present, less strong diesel smell)
  • Used down to 1/8 remaining of the full low sulfur diesel, then filled with premium diesel from reputable station
  • Fuel cleaners through fuel system to try and clear the junk (turbocharger cleaner, and complete fuel system cleaner)
  • Run that tank down to 1/2, and replaced the fuel filter (running better, but still white plumes on acceleration and diesel smell)
This is where I am currently, sitting at half tank still and going to try in the morning as it is Winter here in Australia currently, down to about 6 degrees celsius over last week.

Have checked glow plug relay/module, is receiving input on ignition, earthed well, plugs still lighting on test light.
Have checked air filter and wiring, nil issues. Have checked fuel filter, and wiring, nil issues there.
My only other concern is that the glow plug indicator coil on the dash doesn't light up at all, but it looks as though in the manual this is an optional extra? It is there in the instrument cluster, but I have never seen it light up.


Thoughts?
Just a thought but have you checked the turbo, a slight leak will cause the white smoke and the diesel smell, just a thought
Good luck with it and looking forward to the reason and the fix
 

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Discussion Starter #57
Just a thought but have you checked the turbo, a slight leak will cause the white smoke and the diesel smell, just a thought
Good luck with it and looking forward to the reason and the fix
At the moment, it only happens when leaving the ferry at an incline as per the video in one of the earlier comments, or at idle for longer periods of time on the decline. As per other videos on other comments, no smoke on acceleration at speed on either incline or decline.

Findings so far have been three out of four dead glow plugs (since replaced), and an extra ~2.7L of oil put in at last service by the local mechanic shop (see images in previous comments, which has since been rectified).

At the moment I’m waiting to see what happens, and have been checking the oil level an no movement as yet. Next ferry run is in three days.
 

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Discussion Starter #58
Sorry Pops, I would recommend you re-read the entire thread. If I'm not mistaken, you were trying to get the guy to rip out his injectors!!

My only two advisories were boost pressure leaks, and, wait for it.... engine oil level check!

OP - Please keep us informed!
Alright, been just over a week now with minimal driving as there just hasn't been a need.

Vehicle is quieter, fuel economy is better (from 11L/100km to ~7L/100km). Had no issues until idling at the airport, and a fair bit of smoke pumping out, enough to turn some heads. Then when leaving a bit of a puff then nothing.

This morning I decided to dump all of the oil, fairly sooty in appearance but nothing abnormal, no milky white appearance, nil metal shavings when running a magnet through the drained oil. Filled back up with new oil, and going to go from there. Oil level is now about 5/6 between the two markers.

Smoke at idling, what would be the issue, or could this still be the older oil from being overfilled burning off? Is this more likely to occur at idling?
 

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Discussion Starter #59
Hopefully so , I think a long trip and getting up to a decent temperature would help get the remaining oil sorted sooner rather than later . Not good for DPF to have oil sitting in it and only slowly burning off. We had a ride on mower overturn a couple of weeks ago it took two hours before you could see it cutting grass again due to the smoke.
Bit of an update above.
 

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All good news really then.

I would think that oil is still burning off, and yes, idle is always better for allowing it to pool/gather.

The biggest problems when over filling a diesel engine with oil, is that whilst the crank is submerged in oil, beating through the oil as the engine runs, causes bubbles in the oil. This aerated oil can't be pumped efficiently, or lubricated efficiently. This causes extremely concentrated hot spots at various locations, roasting parts.

The fact that oil is still burning, is a very slight concern, but we need more time to see how it progresses. It still seems like you may have got away with it.
 
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