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Smoke at startup

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Old Nov 24, 2011 | 05:06 PM
  #31  
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Originally Posted by TXSZ66AVLANCHE
...
I cant find a close up of the LS6 valley cover, ...
You must not be able to access the internet, then:



ls6 valley cover - Google Search
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Old Nov 26, 2011 | 11:04 AM
  #32  
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I hope I am not celebrating too soon, but even after leaving the engine to cool overnight and several restarts, NO SMOKE!





Here is what I did.

I removed the valve covers, soaked them overnight in Seafoam, blew them out with an air compressor the next morning (both valve covers, not just the driver's side!) and reinstalled.

I have not seen any smoke since.
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Old Nov 26, 2011 | 11:07 AM
  #33  
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I also squirted the rest of the can of Seafoam into the throttle body while my girlfriend revved the engine first at 2,000 rpm and then at 3,000 rpm.

I will update this thread in a few days to see if my luck holds out.

If this issue is fixed, then this is going to be a valuable thread for future visitors to this web site, since this seems to be a very common problem.

Thank you to everybody who helped with simple instructions about things like what size sockets I needed. You saved me a lot of headaches.
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Old Nov 29, 2011 | 05:31 PM
  #34  
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UPDATE:
It has been most of a week, and no more smoke! This is great!

This thread ought to be a sticky for others who run into this problem. The fix was super-easy!

It was not bad valve seals after all, but a clogged up PCV system that was fixed with a little cleaning.
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Old Dec 1, 2011 | 08:45 AM
  #35  
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Originally Posted by camperhead
i also am having same issue..


2005 GMC 1500 CCSB Z71 5.3
Camperhead, did you try my fix yet? I have been driving a lot lately, and I checked the oil last night. Not only is there no smoke, but there is no oil consumption, either.
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Old Feb 5, 2012 | 05:45 PM
  #36  
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Has this still been successful for you?

My truck just ticked over 100K on it but puff's a large amount of blueish smoke at startup.

Thanks for any reply.
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Old Feb 6, 2012 | 03:56 PM
  #37  
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i havent kept up with this thread... i would love to hear from Junkyard ??
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Old Feb 9, 2012 | 09:23 PM
  #38  
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bump, i installed a catch can today to combat the same blue smoke at startup and some oil consumption. i will update later to see whether this fixed the problem but i was wondering more about what to do on the passenger side valve cover? run the fresh air port to the side of the manifold?
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Old Feb 17, 2012 | 08:10 AM
  #39  
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Originally Posted by camperhead
i havent kept up with this thread... i would love to hear from Junkyard ??
Mine is still going strong - no smoke. What I posted that I did definitely fixed the issue!

It is very easy to do - go on and tackle it this weekend!

8 mm socket, 10 mm socket, maybe a wrench in the same size for that stupid nut back by the firewall on the passenger side that is too close to the firewall.

EASY fix, seriously.

Every shop I talked to wanted to replace the valve seals and all this other nonsense that would have been expensive and would NOT have fixed the smoking problem.

NO oil consumption between oil changes on my 210,000 mile truck!
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Old Feb 17, 2012 | 08:11 AM
  #40  
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Originally Posted by 06Sierra2
bump, i installed a catch can today to combat the same blue smoke at startup and some oil consumption. i will update later to see whether this fixed the problem but i was wondering more about what to do on the passenger side valve cover? run the fresh air port to the side of the manifold?
No catchcan for me. No purchase of any parts. See my post #32 above, with large font. Only cost was a can of Seafoam.
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