I'm looking to move the a/c refrigerant and return lines that are currently through the middle of a window opening to a more natural location so that a window can be installed in the opening. I cleared out a 1" slot to relocate the a/c lines when I ran into a lintel in the top part of the window opening. The idea of cutting the slot through the brick/foundation was to allow the a/c lines to move without calling somebody in to recapture the refrigerant. I'll raise the a/c unit on a platform about 6" and the a/c lines will move up into that slot in the brick.
Now I am concerned that drilling a hole and then cutting entirely through the lintel with a reciprocating saw will weaken the integrity of the structure as it is supporting about 12' of bricks above. The window opening is 30" wide. The lintel can be viewed in the bottom of the slot that was cut but note that it extends into the brick wall about 6" as well and continues up into the brick (the back of the slot that was cut also is blocked by the lintel as it is L-shaped).