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Old 02-27-2011, 02:24 PM   #1
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Default Smokes - Valve Seals?

When I start up my truck when it's cold it smokes pretty good for a couple of minutes. However, if it is a warm day it doesn't smoke at all. When I changed my plugs/wires/cap/rotor last week two of the 8 plugs had oil residue on them. They weren't soaked/wet but you could sure smell it and they were black not the faint brown they should be.

Could this be valve seals or some other problem?

Truck is a 1990 4x4 with 5.8L engine.

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Old 02-27-2011, 02:34 PM   #2
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yep sounds like the valve seal to me if its only for a couple minutes at start up!!
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Old 02-27-2011, 02:56 PM   #3
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How long is a couple minutes? Are you sure its not just Condensation? All vehicles have water vapor smoke when its cold.
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Old 02-27-2011, 04:23 PM   #4
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Depending on the weather it smokes heavily for 2-5 minutes. I was hoping it was just condensation but the huge plume of smoke pouring out the exhaust when I'm driving down the road makes me think otherwise.
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Old 02-27-2011, 04:57 PM   #5
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I had a truck once that had bad valve steem seals. I put in a can of risoline and it really helped. Didn't stop it but then, i wasn't smoking out the neighborhood anymore either.
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Old 02-27-2011, 05:48 PM   #6
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If its white smoke, its water. If its black then I would probably believe its bad valve seals. However, the fact that you only see it on cold days makes me believe it is Condensation.
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