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White smoke while starting up Nissan NV2500


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thezenvan
New User

Dec 4, 2017, 1:29 PM

Post #1 of 3 (119 views)
post icon White smoke while starting up Nissan NV2500 Sign In

I bought a 2013 Nissan NV2500 V8 with 60,000 miles on it several months ago and after a few weeks I went to check the codes and got a P0303 which indicated a misfire on cylinder 3. I was advised to use seafoam in the gas tank to try and resolve the issue and I did that but I also decided to change the spark plugs to see if that would fix the issue, I changed them all and a few of them had ash deposits http://thezenvan.com/images/IMG_0061.jpg. A little while after doing that I started to get white smoke on startup, at first I thought it was just a side effect of the seafoam but it kept doing so for a few weeks so I decided to do a block test to make sure the head gasket wasn't the cause and the test showed it wasn't. I also changed the PCV valves to make sure they aren't the cause. I also did a wet/dry compression test which came out fine https://i.imgur.com/OhZ4RXc.jpg, there were differences between the wet and dry results but they seemed to above minimum. There is oil being burnt because and I periodically need to add some.

At this point I have no idea what's causing the issue, the warranty expired on it so I want to see if I can fix it myself. Any advice would be appreciated, thanks


Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Dec 4, 2017, 2:28 PM

Post #2 of 3 (108 views)
Re: White smoke while starting up Nissan NV2500 Sign In

Does it have white smoke only on start up. If it was burning a lot of coolant, it would smoke all the time and you would smell coolant. Does it feel like it skips right after start up and goes away? Are you having to add coolant? Did the misfire go away after you changed the plugs.

If coolant is getting into a cylinder, that cylinder would be steamed cleaned. If you have a bore scope, you could visually inspect inside the cylinders.

It does look like it is burning oil in cylinders 1 and 3. Usually the only time you need to do a wet test is if you find you have low compression during the dry test to determine if you have a ring or valve issues. Your dry test looks good.


You could stick it on a coolant pressure tester over night with the plugs removed. Then the next morning crank the engine to see if any coolant is laying on top of the piston or coolant flies out the plug holes.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Dec 4, 2017, 2:29 PM)


thezenvan
New User

Dec 4, 2017, 2:34 PM

Post #3 of 3 (101 views)
Re: White smoke while starting up Nissan NV2500 Sign In

Thanks for responding, it smells like burning oil and the white smoke almost always happens on startup and then sometimes a couple of minutes after that while the engine is still warming up. I've had it happen periodically when pressing on the gas after idling at a traffic light.

I did run a block test before and it came back negative, I didn't have any issues with the coolant levels






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