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Message: <blockquote data-quote="VNP" data-source="post: 16530" data-attributes="member: 4388"><p>Hello all sifus,                     Recently my engine was leaking coolant from the cylinder head gasket. No overheating problem here, just coolant leaking. My mechanic advise to do a top overhaul and he insist to skim the cylinder head. From what i understand, if the cylinder head is warp due to overheating only then skimming the cylinder head is neccessary. Does anyone know what is the allowed tolerance to skim the head? Is there any negative effect after skimming the head? Will there be any overheating problem since the compression ratio will be higher and more heat will be produce? Hope someone can clarify. thank you.:listen:</p></blockquote><p></p>