Hmmm,
Check that the rubber donuts are on the two pins at the bottom edges of the rad. These cushion the rad from the frame. They also raise the rad about 1". No donuts would drop the rad/shroud onto the fan and require a cutout.
Worth checking. I ordered new, but found the 10 year old rubber was as soft as the new. I think I kept the old ones if you need them.
Roy