Go Back   Chevrolet Forum - Chevy Enthusiasts Forums > Current Chevy Trucks, SUV's, Crossovers & Vans > Tahoe & Suburban
Sign in using an external account
Register Forgot Password?
Search

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

Reply
 
 
 
 
LinkBack Thread Tools
  #1  
Old 09-10-2010, 03:34 PM
CF Beginner
 
Join Date: Apr 2010
Location: Alabama
Posts: 9
Default Smoke at start up

I have noticed that when I start up my 07 Tahoe I get a puff of smoke on occasion but I cannot readily replicate it. I live in Alabama and its about 90 degrees so I don't think it is a temp issue. I have also received a "low oil" message and have added about a quart of oil. One problem I have is that I've only had it a month and have not had the oil changed so its kind of hard to get a completely accurate reading of how much oil I'm actually using. Is there anything that normally causes this or that I can check? It has 95k on it so if it is something that is covered by the powertrain warranty I want to get it checked out quickly. Also I recently had the fuel injection cleaned so they might be some of the carbon burning but I had noticed the smoke a few times before that. Thanks
Register today for free or log-in if already registered to remove this ad!
Reply With Quote
  #2  
Old 09-10-2010, 04:02 PM
CF Beginner
 
Join Date: Aug 2010
Location: N Va
Posts: 7
Default

A small amount of smoke at start-up and the fact that it's consumed oil is an indication of valve guides going bad. While the engine is at rest residual oil at the top of the head along the valve train leaks down via the valve guide and collects in the cylinder. Once the engine starts it immediately burns this residual oil hence the puff of smoke.

A compression / leak down test can confirm this.
Reply With Quote
  #3  
Old 09-10-2010, 10:04 PM
73shark's Avatar
Administrator
 
Join Date: Apr 2006
Location: KC, MO area
Posts: 8,267
Default

Not sure how a compression test or leak down will check valve guides since the valves are closed when you get a reading. Comp. check is for rings/cyl walls and valve seats.

Now the valve guides could be worn but I'd first suspect the valve seals. Not sure what these new engines use for valve seals.
__________________
2010 Sheer Silver Tahoe LTZ (all options but sunroof, power boards), GM (body color flaps, rear console, 3rd row mat, 2-Way Remote, chrome gas door, Esky rack), Eagle Eye LED tails, SLP dual tip exhaust, Silver bow-ties/rear wiper, Catch-All mats, AlphaTherm washer fluid heater, Putco chrome mirror covers, silver calipers, board chrome trim, tint, GMPP Major Guard

2007 Black Tahoe LTZ (Sold),
(GM flaps-$15, Lund Step Tubes-$80-For Sale)
Reply With Quote
  #4  
Old 09-13-2010, 09:39 AM
CF Beginner
 
Join Date: Apr 2010
Location: Alabama
Posts: 9
Default

So is there a test the dealer can do to confirm the problem or am I going to run into the issue of having to reproduce the smoke, which I can't always do?
Reply With Quote
  #5  
Old 09-13-2010, 10:17 AM
73shark's Avatar
Administrator
 
Join Date: Apr 2006
Location: KC, MO area
Posts: 8,267
Default

Probably have to leave overnite so they can see it upon start-up. That's usually when you'll see it if it's valve seals/guides.
__________________
2010 Sheer Silver Tahoe LTZ (all options but sunroof, power boards), GM (body color flaps, rear console, 3rd row mat, 2-Way Remote, chrome gas door, Esky rack), Eagle Eye LED tails, SLP dual tip exhaust, Silver bow-ties/rear wiper, Catch-All mats, AlphaTherm washer fluid heater, Putco chrome mirror covers, silver calipers, board chrome trim, tint, GMPP Major Guard

2007 Black Tahoe LTZ (Sold),
(GM flaps-$15, Lund Step Tubes-$80-For Sale)
Reply With Quote
  #6  
Old 09-15-2010, 04:39 PM
CF Beginner
 
Join Date: Sep 2010
Location: Frisco, TX
Posts: 5
Default

Most importantly, get this resolved BEFORE your warranty expires!!!
Reply With Quote
  #7  
Old 09-15-2010, 05:09 PM
CF Beginner
 
Join Date: Apr 2010
Location: Alabama
Posts: 9
Default

So I dropped it off at the dealer last night to let it sit over night. Lucky it "smoked like a freight train" the service guy said when they statred it. He said they did some test and the PVC valve is defective. They are ordering it and some seal that they will be replacing tomorrow. Hope this fixes everything.
Reply With Quote
  #8  
Old 10-21-2010, 11:09 AM
CF Beginner
 
Join Date: Oct 2010
Posts: 4
Default

Quote:
Originally Posted by mturnerua View Post
So I dropped it off at the dealer last night to let it sit over night. Lucky it "smoked like a freight train" the service guy said when they statred it. He said they did some test and the PVC valve is defective. They are ordering it and some seal that they will be replacing tomorrow. Hope this fixes everything.

Just wondering how this repair worked out for you and what the seal was they replaced?
Reply With Quote
  #9  
Old 10-21-2010, 11:12 AM
CF Beginner
 
Join Date: Apr 2010
Location: Alabama
Posts: 9
Default

Quote:
Originally Posted by zr800 View Post
Just wondering how this repair worked out for you and what the seal was they replaced?
I believe they replaced the PVC valve and seal and the valve cover seal. It has not had any smoke or oil loss since the repair.
Reply With Quote
Old 10-21-2010, 11:12 AM
 
 
 
Reply

Tags
04, 09, 2009, chevrolet, guides, leaking, puff, replacing, seals, smoke, smokes, start, startup, suburban, tahoe, valve


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On


Join Chevroletforum
Advertising

Featured Sponsors
Vendor Directory
Our Sponsors
All times are GMT -5. The time now is 08:20 PM.

Internet Brands, Inc.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.

Emails Backup