14-05-18, 08:04 PM
Without knowing more I would say no. They'reĀ entirely different circuits. There is a chance that the engine was maybe running a bit hotter with the new plugs but it's not the first place I would look. Was it the first good run in a while? Where is the damage on the radiator? Maybe a stone or something flew into it at speed.
Good luck with fitting the new radiator.
Good luck with fitting the new radiator.