I don't know how that could happen since the block is faced when built. I would set the head on the block without the gasket and verify there is a gap with feeler gauges or use a dial gauge to measure how bad it is. Might correct the problem if there is a thicker head gasket available. If it needs to be corrected I would have it done by a professional. If you go too far it will be a much bigger issue. Was there always a problem with the head gasket or was it OK at one time?
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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas
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