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White smoke while starting up Nissan NV2500white smoke
Posted 04 December 2017 - 01:22 PM
- radin2son likes this
Posted 04 December 2017 - 02:04 PM
Cylinder 3 plug looks terrible! I can see why it was misfiring. 1 doesnt look that great either from what I can see.
If you are positive the smoke is not coolant (coolant isnt dropping and it is not sweet smelling) and not puffy like normal water vapor burning off, then it has to be oil. That would normally mean one of two things (or both). Plus you mention it is burning oil.
1) Your valve guide seals are worn and oil is seeping past once you park
2) Oil is slipping past the piston rings
For both you will only see it on startup, once the engine is hot enough the oil will still be leaking but be burning off faster and cleaner so you wont notice the smoke until things cool down.
Since you seem to know what you are doing, do a leak down test and that will help answer if it is the seals. Compression tests can be too quick for an accurate look at the seals, you need to know if they are still holding well.
- radin2son, andy_george and Alaskan like this
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Posted 04 December 2017 - 03:18 PM
Thanks for responding, I did end up replacing plugs 1 and 3 after the compression test because they had ash deposits while the other plugs were clean.
The white smoke certainly is more indicative of oil burn than water and it is a large white cloud and periodically happens about a minute or two after the initial startup as well but then stops when the engine warms up. I've also had a small cloud happen after pressing on the gas after idleing at a traffic light.
The leakdown test was the next thing on my list I was just looking to see if there was something else I might've missed that would help me avoid taking apart the engine.
- radin2son, ASD Dad and Alaskan like this
Posted 18 January 2019 - 12:36 PM
Does this mean 30/60/90k recommended service should be mandatory? Not cheap, but I have done this. Wonder if this will matter in the long run or does it fall into the can’t hurt...
I don’t have the manual in front of me, but coolant maintenance is important. If you change the coolant before the recommended mileage, you have to replace it on a different schedule.