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Got a 1 hr check over done prior to selling car. States oil leaks at oil pan area and "engine wash and add dye to diagnose further/noted dye on ac compressor area possible leak. Leak test noted. I dont see any oil in the driveway so how significant is that finding? Also, I know the Buick Century has a history of the manifold gaskets going bad and there was a lawsuit a decade or so ago (I think). It this something costly to fix? Does it sound like these gaskets or another issue? I want to be fair to the potential buyer, but he has already been acting shady.

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