Will keep trying with larger tools and report back if I was successful. There is a very small water leak (you can see the firewall rubber splashed in pic 1) New clamps and hoses with 1k miles on it. Leak is random and small, however I do not feel comfortable with that. Do you think clamps are in the proper place? I feel like the lower clamp is somehow outer (just the clamp) and should be more inwards the firewall and later readjusted in the new location. (if you compare upper clamp is a little bit towards the firewall however not sure if that could end in a leak). It´s also strange how things deteriorate even the firewall rubber was new and seems with a lot of miles over.