Wood beam

I made a mistake when I redid the garage while the walls were still open and the door wasnt yet installed
I could have have put a 4x4x 1/4 tubing on top of the beam and additional supports, I never anticipated lifting anything heavier than a engine and I did have a engine crane.
I will have to leave the machine were it is and work on it there rather than at home as thats the only option
Thanks for all the suggestions
Steve. You could buy 2 steel U channels match drilled at least 8” wide. An engineer would have to spec out the necessary weight per foot of the steel. Bolt them to both sides and you should be good to go.