A broken torsion spring is wound under serious tension, and the bar it sits on, the cable drums, and the winding cones are not something to improvise on a Saturday afternoon. People do get hurt doing this themselves, and it's one job we'd tell you flatly not to attempt without the right bars and clamps. If the door is a heavier single-panel steel door from the 1970s era common in Des Lacs, the spring is sized for more weight than a modern lightweight sectional door would need, which raises the stakes further if something slips. Diagnosing which spring type you have - torsion versus extension, and the wire size - is worth a phone call before you touch anything.