Last week the garage door torsion spring snapped. It was at least twenty-five years old and no one lamented it's short life. So a day or two later we got the spring replaced, and a new garage door opener for good measure. The door is wood, single car sized, and quite heavy. I don't have any specs, but the spring is clearly metal, so here I am.
I was not there when the installer was, but I was told he recommended oiling the spring with WD-40 every three months. Now, to me "oiling" and "WD-40" are not the same thing, but I can see people confusing them.
I can see two theories behind why you'd want to oil the spring:
1) a light coat of thin oil will keep it from rusting; and 2) as the door opens and closes, the tension put on and released from the spring causes it to rub against itself.With the previous install, the rollers were occaionally -- perhaps yearly -- lubricated with white lithium grease but that's it. At the end of the life of the old spring, it had a small amount of rust, but I don't think it caused the spring to fail early. Nor did the spring look like it had worn down much, so I'm not sure the rubbing action is very significant.
So what should I plan on doing?
Elijah
------ even if this isn't metalworking, it's metal