LOL, well it is hard to see just from a picture without size references, but nevertheless, this could have fell down time ago where the oil accumulates in engine bay floor, that is why it is broken on both rings, and just now this fell off. to be sure if it is or not, just look inside the hood and inspect radiator hoses. there are two hoses one is the upper radiator and the other I think it is a by pass going to the thermostat housing, these two hoses are parallel to each other and this ring is to prevent friction between the two.
I do not have the van right now to show you in a picture