ok heres what ive got a 120b volvo boiling back thur reservor tank , checked rad and hoses and freeze plugs with temp gun 190 but its still boiling reservior tank .. called volvo they say head gasket blown ,,,,how much of a problem is this going to be to replace both and is this the problem .....
Id say its the gasket ok! not that bad of a job to do!
Hopefully, the gasket and not the head Joern