I would personally go for a replacement tank or proper weld as a long term fix if possible because anything short of welding is likely to crack and allow liquid to keep out as it vibrates. Especially with the mounting being the part that broke, that will put a lot of strain on the repair even with the extra support.
I would personally go for a replacement tank or proper weld as a long term fix if possible because anything short of welding is likely to crack and allow liquid to keep out as it vibrates. Especially with the mounting being the part that broke, that will put a lot of strain on the repair even with the extra support.