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12-28-2003, 12:18 AM
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#1 |
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Registered User
Join Date: Nov 2003
Location: Washington
Posts: 6
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smoke on de-acceleration
Hi all,
Recently I noticed my 65 GMC puts out a puff of blue smoke de-acceleration. Like when I let off the gas to shift. She runs pretty good. Plugs arnt fouling. I just happen to be looking out my side mirror when I shifted today and noticed it. Is this a sign of worn rings or what? Just wondering how concerned I should be. Thanks, Tim |
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12-28-2003, 01:34 AM
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#2 |
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Well, Whoop-dee-do!
 
Join Date: Mar 2003
Location: Easton, Mo. pop.- me & scarcely a few others
Posts: 2,302
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It needs valve seals &/or guides. Decel puts max. vaccum on the intake stem/guide, sucking in oil. Sometimes it can make alot of smoke without using much oil. Even with worn guides, new umbrella or posi-lock seals will help.
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01-24-2004, 02:36 PM
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#3 |
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Registered User
Join Date: Dec 2003
Location: Central Alberta,Can.
Posts: 27
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Yup,most likely seals....can be changed in the truck in an afternoon.Best bet.Check compression to see if its worth doing.Tom
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