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1999 Cadillac Deville hadgasket is leaking outside, drives great, no smoke, do leakstoppers work, if not, should I trade the car or get it fixed? what would best fix this problem?

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Unfortunately leak stoppers won't typicially work and are generally a bad idea anyway. The ports in the engine need to be clean to allow water to flow through them. When leakage occurs, you are not getting water someplace that needs it. If not already, it is only a matter of time before your leaking into cylinders or exhaust. I would try to change head gasket first. It may solve the problem at least temporarily, but if blockage in engine is causing too much pressure it will leak again. Sorry not much else to say. Not a good problem.

Posted on Dec 02, 2008

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