Sorry to hear that. Normally garages are pretty good at suggesting maintenance since it drums up business for them. However, it will be difficult to get them to provide any compensation unless the last problem was related to the timing belt, which it sounds like it wasn't.
The engine will definitely need a new or rebuilt head. Check the cylinder protrusion as well to make sure the rods aren't bent. This is done by measuring with a dial gauge or at least a feeler gauge, how far the cylinder sticks up above the head. This determines what head gasket thickness you use.
The engine will definitely need a new or rebuilt head. Check the cylinder protrusion as well to make sure the rods aren't bent. This is done by measuring with a dial gauge or at least a feeler gauge, how far the cylinder sticks up above the head. This determines what head gasket thickness you use.