Very odd -- radiator unclipped

[McLoffs]

Today I changed the oil and, as usual, visually checked everything around the engine compartment when finising up. I noticed that there was a very slight semicircular mark on the front of the engine. Upon further inspection, I found my radiator could be rocked back and forth. The clips that hold it at the top were unclipped. Fortunately they were still there and I clipped it back. After driving to work this afternoon, I popped the hood out of curiousity and the clips look like they've worked their way a bit loose, though the radiator is still being held where it should be.

My question: Is there anything else I should do/check?

Thanks,
Mike
'93 300E