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Excessive oil consumption. Some smoking when accelerating. No visiable external leaks. Any Idea? 1995 GMC Sierra 2500 5.7 L

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Excessive oil consumption and smoking is usually due to worn rings and/or valve guides in the engine. If you observe blue smoke coming out of the tailpipe, it signals a worn out engine.

If no external leaks, that's what it is. Maybe try to change the oil with a high mileage oil when changing the oil and filter.

I'm afraid, that these conditions don't get better with time.

A replacement motor, or overhaul of the present one is recommended if you cannot pass emissions tests in your area if required by law.

Posted on Nov 12, 2010

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Tim

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If you find this solution to be helpful, then please take a moment to rate this post. - Thanks.

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The smoke you see is the motor oil drop from the valve stem seals.

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