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White Smoke on Start-Up?

Question Description

I don’t understand this question and need help to study.

About a couple weeks ago, I bought a used 2009 Nissan Altima. Sometimes, when I start the car, white smoke comes from the exhaust and last about a couple minutes. The car still drives wonderful, though. I have had the car checked out 3 times, and I have even had the oil changed and the professional fuel injection service done about 4 days ago. Each time I got it checked out, I've been told that the car looks perfect, almost like a brand new car. I haven't had a check engine light or any other light come on, yet I still see smoke. I can understand it happening in the morning because it's been sitting overnight. Sometimes, it happens in the afternoon or even at night when starting the car. When I bought the car, it wasn't even cold outside yet. The temperature has started dropping now though, since it's almost October.

I was told once that it may be the head gasket, but when it was checked out, nothing was wrong with the head gasket. I have not been told about any coolant burning off or oil problems; all of that seems to be ok. The car doesn't overheat, either.

I went to a place called Jiffy Lube during the times it was checked out, and I've even called around to every Nissan dealership in town and asked about it. I was thinking about taking it to Nissan today to see if they can do a diagnostic on it.

What could this be? I am a little frustrated because I got rid of my old car so I didn't have to keep paying money to fix it. I really don't want to keep shelling out unnecessary money. Can anyone help?

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Final Answer

Thank you for the opportunity to help you with your question!

this can be due to the valve guide seal. the remedy can be shutting the door and leting the oil to sink on the valve seeps in between the valve and the valve guide and onto the cylinder.

Please let me know if you need any clarification. I'm always happy to answer your questions.

David M. (442)
Purdue University

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