DYMET

Valve hammering was very loud...
Cylinder head replacement looks very expensive. Use DYMET to reduce cost.

Remove ridges and edges, smooth deep dints by hand mill.

Blast by abrasive K-00-04-16. Keep temperature setting at "3".

Use K-80-13. If narrow cavities are still present use K-20-11. Temperature setting at "3". Build metal with 1 - 1.5 mm excess.

Cleaning, blasting and spraying took about 40 minutes. Now bring to final milling.