Header-mounted torsion, not side-mount
On a door from Homer Glen's typical build era - median year built 1988 - the failure pattern looks different than it does on the older stock closer to Naperville, where the area median dates to 1976. Newer doors here tend to run steel torsion springs on a standard header-mounted shaft rather than the side-mounted setups common on 1960s and 70s construction.
