This 1993 Audi URS4 suffered from overheating issues. Over time the head fatigued and eventually developed cracks.
Depending on the metal, over time, the head can also warp from excessive heat causing a space between the seal and the head. Cracking or wrapping allows coolant to enter into the combustion chamber immobilizing the car.
In order replace this car’s head, and on most cars, the front of the car needs to be disassembled.