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Posted on Mar 09, 2010
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I have a 2003 ford expedition it smokes sometimes when i crank it what could be the cause of this the smoke is blue

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john h

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  • Posted on Mar 09, 2010
john h
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Blue smoke is oil possible worn or damaged component in head-usual problem is valve seal or worn valve guides -pull and inspect the spark plugs look for which one[s] is fouled or oil soaked that will narrow down where ur problem is

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  • Posted on Mar 09, 2010
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The blue smoke is oil being burned. What happens is when you start your engine, it has low oil pressure. The low oil pressure drips past the valve stem seals and into the cumbustion chamber. Once the engine starts running it builds up oil pressure and oil doesn't leak past the seals anymore. The fix is a expensive one. Change all the valve stem seals.

  • Anonymous Mar 09, 2010

    The blue smoke is oil being burned. What happens is when you start your engine, it has low oil pressure. The low oil pressure drips past the valve stem seals and into the cumbustion chamber. Once the engine starts running it builds up oil pressure and oil doesn't leak past the seals anymore. The fix is a expensive one. Change all the valve stem seals.

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