Most mechanic shops offer a 1 year 20k warranty on work done. As for a blown head gasket,if something else caused it (low antifreeze causing over heating)your mechanic shop will probably not give you warranty.
If you get a new engine it will have a new head gasket
A new head gasket.
You do not repair a head gasket you replace it with a new gasket which requires removing the head.
you have put a new head gasket on it.
You can change the head gasket by removing the valve cover. Remove the gasket and clean the gasket surface. Put the new head gasket on the cleaned surface.
Remove the cylinder head from your VW engine. Remove the head gasket and clean the head gasket surface. Put the new head gasket on and return the cylinder head to its original position.
Remove the cylinder heads from your Chevy engine. Remove the head gasket and clean the head gasket surface. Put the new head gasket on and reverse the process.
Head gaskets are expensive but can disable a car if not treated. The cost for a new head gasket for a Toyota is $177.12.
You will need to remove the cylinder heads. Remove the old head gasket and clean the head gasket surface. Put the new head gasket on and reverse the process.
To make sure it is a match and therefore the correct gasket for the engine.
A head gasket set and new head bolts.
Remove the head and fit a new gasket. You may also need the head surface machined flat.