White Smoke?

Tiny
NYOUSEF
  • MEMBER
  • 2018 GMC SIERRA
  • 5.3L
  • V8
  • 2WD
  • AUTOMATIC
  • 85,000 MILES
I just brought a used truck listed above1500 and it blows some white smoke (not a lot), I am wondering if that is an issue and what is causing this smoke?
Sunday, February 5th, 2023 AT 10:59 AM

5 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,269 POSTS
Hi,

When anyone mentions white smoke, the first concern is a faulty head gasket. However, that isn't always the case. I'm not sure where you are located, but if it is cool or cold, some steam can be expected. Based on the temperature outside, it can be a little or a lot.

Now, if the white smoke is excessive and has a sweet smell, it could be coolant being burned in the combustion chamber. Coolant burns white and produces a sweet smell that is usually noticeable. If that is a concern, check to make sure the engine coolant isn't low.

If possible, make a video showing the smoke you see, and upload it for me to see. Also, here is a link you may find helpful. It explains what to check for if you expect a head gasket issue.

https://www.2carpros.com/articles/head-gasket-blown-test

Let me know if that helps or if you have other questions.

Take care,

Joe
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Sunday, February 5th, 2023 AT 4:37 PM
Tiny
NYOUSEF
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Thanks, Joe, for the very informative comments. I am yet to follow up on this issue, the temperature over here is not too cold, here is a video I was able to capture today.
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Monday, February 20th, 2023 AT 5:04 PM
Tiny
JACOBANDNICKOLAS
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Hi,

What I see appears to be normal. Does it eventually stop? What are the temperatures?

Let me know.

Joe
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Monday, February 20th, 2023 AT 8:19 PM
Tiny
NYOUSEF
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Glad to hear that, temperature looks fine, I also didn’t notice any issues with the coolant reservoir liquid level. I probably didn’t drive it enough to tell for sure, but I feel like it does stop after a while.
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Monday, February 20th, 2023 AT 10:01 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,269 POSTS
Hi,

If it was a head gasket issue, the white smoke would be thick and have a sweet smell to it. If you find there are concerns, please let me know.'

Take a look through this link. You may find it helpful.

https://www.2carpros.com/articles/white-smoke-or-steam-coming-from-the-exhaust-pipe

Take care and if I can help in any way, let me know.

Joe
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Tuesday, February 21st, 2023 AT 8:23 PM

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