Notices
Tahoe & Suburban The power, space, and brutal towing ability make the Tahoe and its longer sibling, the Suburban, arguably the best full size SUV's on the market today.

2013 Chevrolet Suburban
Platform: GMT 400, 800, 900

2009 Tahoe LTZ 5.3L, 135K: Blue exhaust on start up

Old February 4th, 2019, 5:47 PM
  #1  
CF Beginner
Thread Starter
 
Join Date: Feb 2019
Posts: 1
Likes: 0
Received 0 Likes on 0 Posts
Default 2009 Tahoe LTZ 5.3L, 135K: Blue exhaust on start up

We bought this new in 2009. It has had every oil change required, using Valvoline 5W30 synthetic. Recently, it started producing blue exhaust smoke on start up. It does not smoke after warm up, and uses no oil. The diagnostics do not indicate any issues. Ideas?
Thanks!
KK51 is offline  
Old February 4th, 2019, 7:08 PM
  #2  
CF Veteran
 
oilcanhenry's Avatar
 
Join Date: Oct 2017
Location: USA
Posts: 1,543
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by KK51 View Post
We bought this new in 2009. It has had every oil change required, using Valvoline 5W30 synthetic. Recently, it started producing blue exhaust smoke on start up. It does not smoke after warm up, and uses no oil. The diagnostics do not indicate any issues. Ideas?
Thanks!
Just a little bit of oil from the valve stem seals/piston and rings, burning off a little oil on startup. Nothing to worry about IMO. I'd just keep doing what you are doing, like chaningthe oil on time and not worry. I like Valvoline synthetic motor oil myself. Used to use Royal Purple, but it doesn't meet the Dexos standard GM set for GDI motors, and frankly I think its overpriced now that I am older and wiser (I hope).
oilcanhenry is offline  
Old February 5th, 2019, 12:20 AM
  #3  
Administrator
 
73shark's Avatar
 
Join Date: Apr 2006
Location: KC, MO area
Posts: 9,656
Received 0 Likes on 0 Posts
Default

Welcome to the forum. Another possibility is worn valve guides. I don't normally believe in chemicals for fixing mechanical problems but in old engines, I have had good luck using something called Restore. It's an oil additive.
73shark is offline  
Old February 6th, 2019, 12:32 PM
  #4  
Administrator
 
in2pro's Avatar
 
Join Date: Apr 2008
Location: Austin, Texas
Posts: 7,526
Likes: 0
Received 0 Likes on 0 Posts
Default

I would second the valve steam seals... every once an a while I might get a bit of blue on start up after the vehicle has sat for a few days, particularly when cold, but otherwise no oil consumption...
in2pro is offline  
Old February 10th, 2019, 9:12 AM
  #5  
CF Active Member
 
Cusser's Avatar
 
Join Date: Dec 2018
Posts: 160
Likes: 0
Received 2 Likes on 1 Post
Default

Originally Posted by KK51 View Post
We bought this new in 2009. It has had every oil change required, using Valvoline 5W30 synthetic. Recently, it started producing blue exhaust smoke on start up. It does not smoke after warm up, and uses no oil. The diagnostics do not indicate any issues. Ideas?
Thanks!
Keep doing what you're doing, no need to fix. New valve stem seals will be costly. Smoke just at first start up and essentially no oil consumption is no need to worry. Just check oil level once per month, and change like you've been doing.
Cusser is offline  

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: