Regarding those spring clamps . . .
A few years ago, I was told to check out a coolant leak on an older GM box van
I found the leak quickly enough, coming from the lower radiator hose. Coolant seeping out from under the hose
Somebody had moved the correct spring clamp a few inches back, and installed a screw type clamp instead, to hold the hose in place
I simply discarded the junky screw type clamp and moved the factory spring clamp back into its proper position
Problem solved. No more leak. I've seen that van a few times, since my repair, and there have been no more leaks from the lower radiator hose area
Bottom line . . . some idiot had previously created a problem, where none had existed, before he got his grubby paws on the vehicle