Question about 2000 Buick LeSabre

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Coolant dissappears with no visable leaks.

After sitting overnight, resevoir is empty, engine struggles to turn over. When cranked, very much white smoke from tailpipe for five minutes. Have been told that I have a hole rusted in the plenium, leaking coolant into the engine. Is a plenium the same as a manifold? where is the plenium located?

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  • Jack Bowser May 11, 2010

    It sound more like a head or a head gasket. If is rusted it cannot be the intake manifold it is aluminum. If you do take off the heads have them check at a auto machine shop for wrapage and cracks.

  • yadayada
    yadayada May 11, 2010

    u most likely have a leaking cylinder head gasket, check for bubbles in the coolant recovery tank when first started to confirm this.

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  • Expert
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Yes the plenium is part of the intake.dont mess around otherwise you will blow the engine.it should cost on more then 400.00 dollars to fix.If your broke.you can try using a engine block sealer.that stuff has worked for me in the past.

Posted on Mar 10, 2009

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  • Buick Master
  • 2,984 Answers

Yes...sort of the same...you are getting coolant in the motor...like a hairline crack in the head.

Posted on Mar 10, 2009

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The 3.8-liter V6 may leak coolant into the engine from the intake manifold. A new gasket kit, revised throttle body nuts, and sealing compound is available.

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