Question about 1989 Buick LeSabre

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I have a 1998 Buick Lesabre that keeps losing antifreeze.

I have a 1998 Buick Lesabre That keeps losing anifreeze. There are no puddle under the car. I Can not find a leak. There is no water in the oil,

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  • Timmy Jul 23, 2012

    1998 Buick -LeSabre Custom .Because the Intake Plenum get to hot it melts a hole in the plastic and your antifreeze goes into your EGR which **** gases . Which results in antifreeze in your block of engine. MY cost to have fixed was $785.76

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Buick 3.8's are notorious for intake manifold leaks. If you are sure you are not leaking externally (look under the alternator and on the top of the transmission), it could be an intake manifold leak. I've replaced mine...I didn't think it was too hard a job for an amateur.
It could also be a head gasket, but the intake leaks are much more common.

Posted on Dec 25, 2009

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You may have an internal leak fro a head gasketand your burning the coolant in small amounts, look for white smoke on a cold start,or sometimes small external leaks wont be detected unless you put the cooling system under pressure with a coolant pressure tester.

Posted on Nov 05, 2009

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