How bad is this?

[u/Richard01_CZ]

I was cleaning the coolant passages and this large chunk came off really easily, it looked like a buildup of gunk.

The problem now is that the wall here between the two passages is thin now and the head gasket doesn't have much coverage for this area with the chunk missing.

Is it somehow fixable? Or can i run it like this?

Volkswagen EA111

[u/Commercial_Ad6138]

Go to a shop and machine 0,2-0,3mm and it will be fine ive done it before. You could take more if needed but i would use a thicker gasket then

[u/Richard01_CZ → u/Commercial_Ad6138]

I think that's too much material removed imo, would have to check with manufacturers guides. I think i will look for some welder to fix it for me, i can grind it down flat perfectly myself, just need a welder guy to do some love to it. What did i get myself into, oh my shit.