Abstract: A method for retrofitting an end cover of a turbine engine combustor. The method includes inserting a first insert into a opening formed in the end cover so a circular land on the insert centers the insert in the opening and an annular face on the insert engages a face of the opening. The first insert includes a cylindrical tip section opposite the base having a diameter smaller than a diameter of the opening. The base of the first insert is joined to the opening. The method includes inserting a second insert into the opening so an outer diameter of the second insert is positioned inside the diameter of the opening. The second insert has an inner land adapted to engage the outer diameter of the first insert to position the second insert relative to the first insert and the opening. The second insert is joined to the end cover.