Tools R Us said:Trust me, seen that kind of damage a bunch of times, something was hanging there, everytime the truck accelerated it swung back impacting the condenser, when the brakes were applied it swung forward, then back into the condenser when the truck stopped. When turning it swings to the side impacting in an arc. Each impact made a small dent in the fins, overtime that's the mark it leaves. From the shape of it, I would guess that the bolt came out of the horns and they hung by their wires, but it could have been a bunch of things including a chain hood lock like Koffer said, most of the time chains leave a bunch of closer together arcs, one for each link.
I'm with Tool on this one.
