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White smoke coming from exhaust. LIM gasket failure?

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Old Jan 13, 2018 | 03:59 PM
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Default White smoke coming from exhaust. LIM gasket failure?

Ok, so.... Moving a trailer today across the yard, and I noticed smoke from the exhaust. It's not always a little, but I noticed it since I bought it. I take off the oil cap and don't feel any blow by (absolutely nothing) so I'm assuming the rings are good. It doesn't smell sweet, more like oil. Is this a symptom of LIM gasket failure? Replaced the PCV valve already
 
Old Jan 13, 2018 | 06:22 PM
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I'm thinking valve cover gasket. Don't know much about the other engines when it comes to this, but on the 2.2's that was the issue.
 
Old Jan 14, 2018 | 08:43 PM
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Is it just when it's first running, or all the time? If it's burning oil just when it first starts, and then dissipates, valve seals are usually the cause.

However, oil smoke usually looks blueish, and coolant smoke looks more white. Are you loosing any coolant or oil? I would keep an eye on the levels of both to determine which it's actually loosing
 
Old Jan 14, 2018 | 08:46 PM
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Originally Posted by chevyriders
Is it just when it's first running, or all the time? If it's burning oil just when it first starts, and then dissipates, valve seals are usually the cause.

However, oil smoke usually looks blueish, and coolant smoke looks more white. Are you loosing any coolant or oil? I would keep an eye on the levels of both to determine which it's actually loosing
It smokes all the time, but it is more prominent when the engine is warm. The smoke is also blue.
 
Old Jan 15, 2018 | 01:03 AM
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a pic or even video is worth a thousand words when it comes to smoke.
 
Old Jan 15, 2018 | 01:05 AM
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Originally Posted by error_401
a pic or even video is worth a thousand words when it comes to smoke.
I will see if I can upload a video of the smoke. It seems to only occur when the engine is being slowed down by the transmission
 
Old Jan 15, 2018 | 11:02 AM
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Originally Posted by '93BLZR
I will see if I can upload a video of the smoke. It seems to only occur when the engine is being slowed down by the transmission
Bad valve stem seals/valve guides is cause of blue smoke at high vacuum (deceleration). Oil gets sucked down the valve stem through the valve guide.
 

Last edited by LesMyer; Jan 15, 2018 at 03:06 PM.
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