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White smoke

Tiny
ADIEADAMSON
  • MEMBER
  • 2010 CADILLAC STS
  • 3.6L
  • V6
  • 2WD
  • AUTOMATIC
  • 20,000 MILES
Clouds of white smoke after cold start and for about five miles.
Saturday, June 1st, 2019 AT 6:04 AM

3 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

White smoke is an indication of burning coolant. It can come from a head gasket or an intake manifold gasket.

https://www.2carpros.com/articles/replace-intake-manifold-gasket

You will need to have a leak down test done to determine if a head gasket is the failure.

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

What has been checked so far?

Roy
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Saturday, June 1st, 2019 AT 7:20 AM
Tiny
ADIEADAMSON
  • MEMBER
  • 2 POSTS
I have done a block test, that was fine, The car is nine year old and the genuine mileage is 13,000. I bought it six months ago, not sure if this problem could have be caused by lack of use?
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Saturday, June 1st, 2019 AT 9:14 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
No, you need to do a leak down test. The block test is not accurate at all. That is when you remove the plugs and add shop air into each cylinder one at a time and watch for coolant movement in the radiator. That is the only accurate check for a failed head gasket.

Roy
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Saturday, June 1st, 2019 AT 11:40 AM

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