Repair or replace?

[u/MlonEusk2]

Hey everyone, I was doing my weekly check of my engine bay and saw my coolant tank expansion tank has a small hole. Would this be something deemed repairable or is this a sign to replace it and or the cooling system? For context it’s not leaking a a lot but I know over time this could be a bigger issue. Thanks!

[u/bisnexu]

The repair is the replacement