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 Valve seals? 
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Joined: Wed Jan 28, 2009 3:23 pm
Posts: 506
Location: Catawissa PA
Post Valve seals?
So my truck has developed an issue. 2005 silverado 5.3 170,000 miles. At startup I'm getting a good cloud of grey smoke out the exhaust. still runs good, PVC looks pretty clean. So I'm leaning towards valve seals.

Any thoughts?

Would like to get another year out of it.

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Mon Jan 05, 2015 12:15 pm
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Joined: Sun Jan 25, 2009 2:00 pm
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Location: Lumberton, NJ
Post Re: Valve seals?
Could be, not a very common issue on LSX's even with that mileage. If it only happens at start up then yeah, I would guess valve seals. I would just drive it till it dies unless you are losing quantity.

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Mon Jan 05, 2015 1:29 pm
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Joined: Tue Jan 27, 2009 1:50 pm
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Location: New Ringgold, PA
Post Re: Valve seals?
My 06 5.3 has 216k on it. Got it with 212k and just did the first second oil change (changed it when I got it with 10w30 and lucas oil stabilizer). Used about two quarts of the cheap stuff in 4k. I wouldn't be afraid of a little smoke on startup.

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Mon Jan 05, 2015 3:49 pm
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