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2004 Chevrolet Avalanche Blue smoke

Tiny
JCSROCKS
  • MEMBER
  • 2004 CHEVROLET AVALANCHE
  • V8
  • 4WD
  • AUTOMATIC
  • 198,000 MILES
Blue smoke about once a week when I start it
Monday, October 19th, 2015 AT 2:23 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
With that many miles, it could be a few things. However, most commonly it is the valve seals which have broken down or gotten hard and brittle allowing oil to bypass them. If you use full throttle, does it happen?
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Monday, October 19th, 2015 AT 6:16 PM
Tiny
JCSROCKS
  • MEMBER
  • 2 POSTS
I have never noticed it except about once a week, and only when I first start it. Has not been burning oil, just had it changed couple weeks ago, will ck see if it is down any in the morning. Thanks for your response
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Monday, October 19th, 2015 AT 9:13 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Let me know what you find. Chances are it is what I mentioned. However, with that many miles, it could be rings or valve guides. A compression test will help answer questions.
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Tuesday, October 20th, 2015 AT 5:39 PM

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