So, that's a good catch. I did not notice that either... now that you point it out.
I'm not 100% sold on the electrolysis theory... alone. I know that it is not flex... radiator is attached to the grill shell, and not enough flex there to move the radiator. I wonder about a combination of electrolysis and vibration, one exacerbating the other rapidly speeding up the failure.
Using some iso pads to mount an aluminum radiator would eliminate/greatly diminish both of those issues, then the cause would be something else. Something like these is what you are thinking?
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