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Message: <blockquote data-quote="Tazza" data-source="post: 129495" data-attributes="member: 82">You say the dealer says they don't re-torque head gaskets on new machines, that is because they run metal head gaskets, not composite.The V1702/v1902 engine is not made anymore, they always ran a composite head gasket. You are comparing a caddillac, that as far as i am aware was petrol/gas to a diesel that runs wayyyy higher cylinder pressures.The newer V2203 replacement or other 03 series engines come from the factory with a metal head gasket that you set and forget. We only put composite head gaskets on the '03 series engines if we had to skim the block more than usual and we need to maintain the correct top clearance, so we use a thicker head gasket or you need to skim the pistons.Modern cars also run MLS head gaskets, that's why they are built and from the factory floor, they never need touching if all goes well.But again, for a $100 head gasket, it's cheap enough to replace if it was to fail. I'd like to see how this science experiment plays out, so please do keep us informed.</blockquote>