Question about 1994 Mercury Grand Marquis

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Smoke comeing from exsost - 1994 Mercury Grand Marquis

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You have a blown headgasket, cracked cylinder head, cracked block only if the color of the smoke is a constant white...requires extensive tests compression etc.
if uits blue in color you have oil passing the rings and out the exhaust valeves on the exhaust stroke, possible collapsed oil rings or valve guide stem seals and knerling ...requirements machinist work.
Momentary cold start white smoke can be normal residual condensation that clears rapidly after start up, blue intial smoke on only the start up after sitting for hours is signs of valve guide wear to be done by a machine shop.

Posted on Sep 01, 2010

  • JOHN DAVIDSON Sep 01, 2010

    Have Fun diagnosing your repairs!!!

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