Is scheduled grinding mandatory when changing the ZKD

Hello, my Punto I (Bj95, 200tkm) gives up the mind and I want to prevent it as soon as possible. To do everything right I drove directly after the red Temp. warning light went to the workshop, there they had told me after 10 minutes of testing that the cylinder head seal is in the eimer. Repair costs 1000Euro incl. material. Since then I drove with the car no more meters.The amount seemed to me a little too much, and therefore I will also be it on a weekend The only thing I can’t do is to grind the plan. Is this absolutely necessary? How can you measure the displacement of the cylinder head? If it’s a duty to grind the cylinder head when changing the ZKD, where could you let it be done? Thank you in advance, Greeting, Manni