Why is there white smoke when I first start my car?

Tiny
AUGIS DONELAITIS
  • MEMBER
  • 2018 FORD FLEX
  • 3.5L
  • 6 CYL
  • TURBO
  • 4WD
  • AUTOMATIC
  • 28,000 MILES
Hello, when I start my car white smoke comes from exhaust for 10 15 seconds and after disappears, is it normal?
Tuesday, August 9th, 2022 AT 6:00 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,749 POSTS
Hi,

In most cases, that is normal. What happens is condensation builds up in the exhaust system as it cools. When you start it, the heat turns the condensation into steam.

The only other thing would be if engine coolant is getting into the combustion chamber. But that usually will last longer and be a very thick white smoke.

Do me a favor. First, confirm the engine coolant isn't low. If it appears low, when you see the smoke from the exhaust, confirm it doesn't have a sweat smell to it.

Let me know what you find.

Joe
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Tuesday, August 9th, 2022 AT 7:33 PM
Tiny
AUGIS DONELAITIS
  • MEMBER
  • 2 POSTS
Hello Joe, thanks for your reply, the coolant level stays normal, a bit higher when engine is warm, the smell is normal. It starts when I'm starting the car, after 10-15 seconds it disappears.
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Wednesday, August 10th, 2022 AT 5:15 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,749 POSTS
Hi,

Everything you mentioned points to simple condensation burning off in the exhaust. That is absolutely nothing to worry about and is normal.

If anything changes, let me know.

Take care and please feel free to come back anytime in the future.

Joe
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Wednesday, August 10th, 2022 AT 11:12 AM

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